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Patent #:
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Issue Dt:
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08/20/1991
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Application #:
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07400912
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Filing Dt:
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08/30/1989
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Title:
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PLURAL DISC ARRANGEMENT AND COOLING SYSTEM THEREFORE
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Patent #:
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Issue Dt:
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12/03/1991
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Application #:
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07443367
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Filing Dt:
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11/30/1989
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Title:
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MAGNETIC DISK DRIVE
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Patent #:
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Issue Dt:
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12/22/1992
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Application #:
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07460519
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Filing Dt:
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01/03/1990
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Title:
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SERVO POSITIONING CIRCUIT
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Patent #:
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Issue Dt:
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03/16/1993
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Application #:
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07460525
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Filing Dt:
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01/03/1990
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Title:
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SERVO CIRCUIT
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Patent #:
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Issue Dt:
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04/20/1993
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Application #:
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07460651
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Filing Dt:
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01/03/1990
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Title:
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SERVO CIRCUIT FOR MAGNETIC DISK APPARATUS
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Patent #:
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Issue Dt:
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03/16/1993
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Application #:
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07460668
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Filing Dt:
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01/03/1990
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Title:
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SERVO CIRCUIT CONTROL METHOD AND SYSTEM
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Patent #:
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Issue Dt:
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10/23/1990
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Application #:
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07472636
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Filing Dt:
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01/30/1990
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Title:
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SERVO CIRCUIT
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Patent #:
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Issue Dt:
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03/24/1992
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Application #:
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07486423
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Filing Dt:
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02/28/1990
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Title:
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A HEAD ACTUATOR HAVING A PLURALITY OF HEAD ARMS AND LOAD SPRINGS FOR DISC DRIVE AND STORAGE SYSTEM, AND RELATED METHOD ASSEMBLY
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Patent #:
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Issue Dt:
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11/10/1992
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Application #:
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07500055
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Filing Dt:
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03/27/1990
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Title:
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APPARATUS AND METHOD FOR READING FROM AND WRITING TO A MAGNETIC RECORDING MEDIUM
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Patent #:
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Issue Dt:
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09/01/1992
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Application #:
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07530524
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Filing Dt:
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05/30/1990
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Title:
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METHOD OF CONTROLLING POSITIONING OF MAGNETIC HEAD OF DISK DRIVE UNIT AND DISK DRIVE UNIT EXECUTING SAME
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Patent #:
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Issue Dt:
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03/09/1993
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Application #:
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07570022
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Filing Dt:
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08/20/1990
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Title:
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PULSE WIDTH MODULATION CONTROL SYSTEM FOR A MOTOR
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Patent #:
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Issue Dt:
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12/14/1993
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Application #:
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07578916
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Filing Dt:
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09/07/1990
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Title:
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ENCODING AND DECODING CIRCUIT FOR RUN-LENGTH-LIMITED CODING
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Patent #:
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Issue Dt:
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05/12/1992
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Application #:
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07650271
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Filing Dt:
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02/04/1991
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Title:
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ROTATING SUPPORT APPARATUS IN DISK STORAGE DEVICE
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Patent #:
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Issue Dt:
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09/29/1992
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Application #:
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07652822
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Filing Dt:
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02/08/1991
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Title:
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SYSTEM FOR POSITIONING A TRANSDUCER
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Patent #:
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Issue Dt:
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12/07/1993
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Application #:
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07700154
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Filing Dt:
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04/29/1992
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Title:
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SEEK CONTROL METHOD AND APPARATUS FOR DISK APPARATUS
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Patent #:
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Issue Dt:
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05/10/1994
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Application #:
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07766399
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Filing Dt:
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09/27/1991
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Title:
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METHOD AND SYSTEM FOR POSITIONING HEAD ON TARGET CYLINDER OF DISK
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Patent #:
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Issue Dt:
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02/15/1994
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Application #:
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07811798
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Filing Dt:
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12/20/1991
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Title:
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SPEED GAIN CONTROL BASED UPON ACCESS TIME FOR EACH CYLINDER
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Patent #:
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Issue Dt:
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03/08/1994
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Application #:
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07825387
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Filing Dt:
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01/24/1992
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Title:
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METHOD FOR GENERATING A REFERENCE SIGNAL FROM UNIQUE SERVO MARK PATTERN DETECTION
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Patent #:
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Issue Dt:
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05/30/1995
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Application #:
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07866441
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Filing Dt:
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04/10/1992
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Title:
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DUAL MEMORY DISK DRIVE
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Patent #:
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Issue Dt:
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06/14/1994
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Application #:
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07875080
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Filing Dt:
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04/28/1992
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Title:
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DATA HEAD OFFSET DETECTING CIRCUIT IN MAGNETIC DISK UNIT AND MAGNETIC DISK UNIT USING SAID DATA HEAD OFFSET DETECTING CIRCUIT
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Patent #:
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Issue Dt:
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07/11/1995
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Application #:
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07910311
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Filing Dt:
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07/26/1993
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Title:
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MAXIMUM-LIKELIHOOD DECODING METHOD AND DEVICE
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Patent #:
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Issue Dt:
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03/21/1995
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Application #:
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07945455
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Filing Dt:
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09/16/1992
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Title:
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STORAGE DEVICE HAVING VIBRATORY HEAD
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Patent #:
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Issue Dt:
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09/05/1995
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Application #:
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07991791
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Filing Dt:
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12/17/1992
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Title:
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VOICE COIL MOTOR FOR DISK DRIVE
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Patent #:
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Issue Dt:
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08/30/1994
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Application #:
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08009773
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Filing Dt:
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01/27/1993
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Title:
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METHOD AND APPARATUS FOR SELF-SYNCHRONIZING SEEK DECELERATION
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Patent #:
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Issue Dt:
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08/16/1994
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Application #:
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08021328
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Filing Dt:
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02/23/1993
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Title:
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POSITIONING CONTROL METHOD AND APPARATUS OF HEAD WHICH IS USED IN MAGNETIC DISK APPARATUS
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Patent #:
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Issue Dt:
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06/10/1997
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Application #:
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08021329
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Filing Dt:
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02/23/1993
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Title:
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MAGNETIC DISC APPARATUS
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Patent #:
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Issue Dt:
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10/03/1995
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Application #:
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08023094
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Filing Dt:
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02/26/1993
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Title:
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METHOD OF COMPENSATING OFFTRACK IN DISK UNIT
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Patent #:
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Issue Dt:
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07/11/1995
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Application #:
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08023806
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Filing Dt:
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02/25/1993
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Title:
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MAGNETIC DISK UNIT HAVING A PLURALITY OF MAGNETIC HEADS
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Patent #:
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Issue Dt:
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06/25/1996
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Application #:
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08055038
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Filing Dt:
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04/29/1993
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Title:
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GROUPING OF INTERRUPT SOURCES FOR EFFICIENCY ON THE FLY
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Patent #:
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Issue Dt:
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11/07/1995
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Application #:
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08058011
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Filing Dt:
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05/05/1993
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Title:
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RECORDING METHOD OF SERVO INFORMATION
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Patent #:
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Issue Dt:
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03/21/1995
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Application #:
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08062582
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Filing Dt:
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05/17/1993
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Title:
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MAGNETIC DISK APPARATUS WITH FLEXIBLE PRINTED CIRCUIT ATTACHED TO HEAD CARRIAGE BY DOUBLE SIDED PRESSURE SENSITIVE TAPE
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Patent #:
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Issue Dt:
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07/19/1994
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Application #:
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08067970
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Filing Dt:
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05/27/1993
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Title:
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DISK UNIT WITH A DEVICE TO DIVERT LEADS FROM THE HEAD
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Patent #:
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Issue Dt:
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04/04/1995
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Application #:
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08081635
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Filing Dt:
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06/24/1993
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Title:
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ESTIMATOR-BASED RUNOUT COMPENSATION IN A DISK DRIVE
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Patent #:
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Issue Dt:
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01/30/1996
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Application #:
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08098704
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Filing Dt:
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07/28/1993
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Title:
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METHOD FOR CONTROLLING ACTIVATION OF DISK DRIVE MOTORS
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Patent #:
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Issue Dt:
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05/21/1996
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Application #:
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08106723
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Filing Dt:
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08/16/1993
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Title:
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SPINDLE MOTOR AND DISK DRIVE HAVING THE SAME
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Patent #:
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Issue Dt:
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04/11/1995
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Application #:
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08115043
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Filing Dt:
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09/01/1993
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Title:
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CLOCK GENERATOR FOR MAGNETIC DISK DRIVE THAT SWITCHES BETWEEN PREAMBLE AND DATA PORTIONS
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Patent #:
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Issue Dt:
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12/13/1994
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Application #:
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08141732
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Filing Dt:
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10/27/1993
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Title:
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PHASE SYNCHRONIZATION CIRCUIT HAVING A LOOP FILTER INCLUDING TWO VOLTAGE/CURRENT CONVERTERS
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Patent #:
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Issue Dt:
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07/25/1995
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Application #:
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08176677
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Filing Dt:
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01/03/1994
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Title:
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A DISK SYSTEM HAVING A SLIDER WHICE IS CONTINUOUSLY HEATED FOR PREVEN- TING ORGANIC MATERIAL BUILDUP
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Patent #:
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Issue Dt:
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06/04/1996
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Application #:
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08194663
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Filing Dt:
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02/08/1994
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Title:
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HEAD POSITION DETECTING METHOD AND APPARATUS
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Patent #:
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Issue Dt:
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05/23/1995
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Application #:
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08197541
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Filing Dt:
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02/17/1994
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Title:
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HALF-HEIGHT MAGNETIC DISK DEVICE HAVING A LEAD WIRE RETAINING GROOVE IN THE ACTUATOR ARM
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Patent #:
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Issue Dt:
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03/18/1997
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Application #:
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08248334
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Filing Dt:
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05/24/1994
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Title:
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MAGNETIC SPRING ARM ASSEMBLY INCLUDING STRUTURE FOR PREVENTING DAMAGE TO A CONDUCTIVE LAYER RESULTING FROM BENDING
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Patent #:
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Issue Dt:
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02/11/1997
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Application #:
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08267208
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Filing Dt:
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07/06/1994
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Title:
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ZERO LEVEL SETTING CIRCUIT FOR A/D CONVERTER IN A MAGNETIC DISK DRIVE
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Patent #:
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Issue Dt:
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06/04/1996
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Application #:
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08284246
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Filing Dt:
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08/02/1994
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Title:
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ELECTROSTATIC ACTUATOR HAVING FERROELECTRICS IN WHICH RESIDUAL DIELECTRIC POLARIZATION IS FORMED
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Patent #:
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Issue Dt:
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12/02/1997
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Application #:
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08298052
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Filing Dt:
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08/30/1994
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Title:
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DISK APPARATUS FOR DETECTING POSITION OF HEAD BY READING PHASE SERVO PATTERN
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Patent #:
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Issue Dt:
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01/14/1997
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Application #:
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08326471
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Filing Dt:
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10/20/1994
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Title:
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SEEK CONTROL SYSTEM BASED UPON A DETECTED TEMPERATURE OF A POSITIONING MECHANISM IN A DISK DEVICE
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Patent #:
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Issue Dt:
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03/03/1998
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Application #:
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08336536
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Filing Dt:
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11/09/1994
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Title:
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METHOD AND APPARATUS FOR CONTROLLING SPINDLE MOTOR
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Patent #:
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Issue Dt:
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07/22/1997
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Application #:
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08342815
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Filing Dt:
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11/21/1994
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Title:
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DISK UNIT PERFORMING CONTROL USING SECTOR PULSES
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Patent #:
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Issue Dt:
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01/07/1997
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Application #:
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08343229
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Filing Dt:
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11/22/1994
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Title:
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POWER SUPPLY SYSTEM
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Patent #:
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Issue Dt:
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05/19/1998
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Application #:
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08345583
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Filing Dt:
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11/28/1994
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Title:
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MAGNETIC DISK DRIVE UNIT WITH COMPLEX MAGNETIC HAND OF VARIABLE READING WIDTH
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Patent #:
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Issue Dt:
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12/31/1996
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Application #:
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08346370
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Filing Dt:
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11/29/1994
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Title:
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BREATHER FILTER UNIT FOR MAGNETIC DISK DRIVE
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Patent #:
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Issue Dt:
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01/07/1997
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Application #:
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08347516
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Filing Dt:
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11/30/1994
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Title:
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APPARATUS FOR MEASURING OFFSET OF HEAD FROM SERVO PATTERN OF DATA SURFACE AND DISK MEDIUM HAVING RECORDED SERVO PATTERN FOR MEASUREMENT OF OFFSET
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Patent #:
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Issue Dt:
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12/09/1997
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Application #:
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08348563
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Filing Dt:
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12/02/1994
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Title:
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A HEAD ASSEMBLY FOR RECORDING AND REPRODUCING INCLUDING A HEAD SUPPORTING PART HAVING AN ADHESIVE ADJUSTING PATTERN
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Patent #:
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Issue Dt:
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07/22/1997
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Application #:
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08348758
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Filing Dt:
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12/02/1994
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Title:
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GIMBALLED SPRING ARM HAVING A REINFORCED PLATE FOR USE WITH A MAGNETIC HEAD
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Patent #:
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Issue Dt:
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03/11/1997
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Application #:
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08356159
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Filing Dt:
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12/15/1994
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Title:
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MULTIBYTE ERROR CORRECTING SYSTEM
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Patent #:
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Issue Dt:
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02/25/1997
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Application #:
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08363983
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Filing Dt:
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12/23/1994
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Title:
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METHOD FOR CORRECTING OFFSET IN A MAGNETIC DISK INCLUDING APPARENT OFFTRACK CANCELLATION
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Patent #:
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Issue Dt:
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07/08/1997
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Application #:
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08368640
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Filing Dt:
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01/04/1995
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Title:
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MAGNETIC DISC DEVICE HAVING A LEAD WIRE RETAINING GROOVE IN THE ACTUATOR
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Patent #:
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Issue Dt:
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12/01/1998
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Application #:
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08370613
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Filing Dt:
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01/10/1995
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Title:
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ACTUATOR ARM ASSEMBLY HAVING ACTUATOR ARM WIRING PATTERN AND A HEAD SUSPENSION WIRING PATTERN
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Patent #:
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Issue Dt:
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06/09/1998
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Application #:
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08384438
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Filing Dt:
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02/02/1995
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Title:
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MECHANISM FOR MINUTE MOVEMENT OF A HEAD
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Patent #:
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Issue Dt:
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08/19/1997
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Application #:
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08385661
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Filing Dt:
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02/07/1995
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Title:
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DATA STORAGE APPARATUS HAVING SERVO CONTROL SYSTEM
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Patent #:
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Issue Dt:
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05/28/1996
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Application #:
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08389327
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Filing Dt:
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02/16/1995
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Title:
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METHOD OF COMPENSATING OFFTRACK IN DISK UNIT
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Patent #:
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Issue Dt:
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12/14/1999
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Application #:
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08400720
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Filing Dt:
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03/08/1995
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Title:
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PRML REGENERATING APPARATUS HAVING ADJUSTED SLICE LEVELS
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Patent #:
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Issue Dt:
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06/03/1997
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Application #:
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08401958
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Filing Dt:
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03/10/1995
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Title:
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METHOD OF MANUFACTURING A MAGNETIC HEAD
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Patent #:
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Issue Dt:
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03/09/1999
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Application #:
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08406807
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Filing Dt:
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03/20/1995
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Title:
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DISK DRIVE HAVING A THICKNESS EQUAL TO AN IC MEMORY CARD
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Patent #:
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Issue Dt:
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06/10/1997
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Application #:
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08410687
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Filing Dt:
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03/27/1995
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Title:
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APPARATUS HAVING SOURCE POWER CONTROL UNIT RESPONSIVE TO VOLTAGE FLUCTUATION
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Patent #:
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Issue Dt:
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05/07/1996
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Application #:
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08417259
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Filing Dt:
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04/05/1995
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Title:
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STORAGE DEVICE
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Patent #:
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Issue Dt:
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06/09/1998
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Application #:
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08432469
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Filing Dt:
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05/01/1995
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Title:
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DISK SUBSYSTEM USING A PAIR OF UNIDIRECTIONAL CONTROL LINES FOR EXCHANGING CONTROL INFORMATION IN BIT-SERIAL BETWEEN CONTROL DEVICE AND PLURAL DISK UNITS THROUGH UP/DOWN DIRECTIONS
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Patent #:
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Issue Dt:
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08/25/1998
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Application #:
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08435132
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Filing Dt:
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05/05/1995
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Title:
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HEAD POSITIONING CONTROL FOR DISK APPARATUS USING PEAK DETECTION, POLARITY DETECTION AND SECTOR MARK DETECTION
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Patent #:
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Issue Dt:
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03/04/1997
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Application #:
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08462751
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Filing Dt:
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06/05/1995
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Title:
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DISK DRIVEHEAD RETRACTING ARRANGEMENT WHICH INCLUDES RETRACTION YOKE PORTIONS SEPARATED BY A GAP OF VARYING HEIGHT
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Patent #:
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Issue Dt:
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12/14/1999
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Application #:
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08475181
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Filing Dt:
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06/07/1995
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Title:
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MAGNETIC HEAD SUPPORTING MECHANISM
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Patent #:
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Issue Dt:
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10/21/1997
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Application #:
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08502837
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Filing Dt:
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07/14/1995
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Title:
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DYNAMICALLY DAMPED MAGNETIC RECORDING CIRCUIT
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Patent #:
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Issue Dt:
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08/05/1997
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Application #:
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08503882
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Filing Dt:
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07/18/1995
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Title:
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MAGNETIC DISK APPARATUS
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Patent #:
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Issue Dt:
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08/19/1997
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Application #:
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08508113
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Filing Dt:
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07/27/1995
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Title:
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MAGNETIC HEAD ARM, METHOD OF PRODUCING THE SAME AND APPARATUS FOR PRODUCING THE SAME
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Patent #:
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Issue Dt:
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11/24/1998
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Application #:
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08521265
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Filing Dt:
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08/30/1995
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Title:
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HEAD SLIDER WITH PROJECTIONS ARRANGED ON RAILS THEREOF
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Patent #:
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Issue Dt:
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07/01/1997
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Application #:
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08539340
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Filing Dt:
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10/05/1995
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Title:
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HEAD SIGNAL SUPPLY/RETRIEVAL STRUCTURE FOR MAGNETIC DISK DRIVE
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Patent #:
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Issue Dt:
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06/29/1999
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Application #:
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08541874
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Filing Dt:
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10/10/1995
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Title:
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INFORMATION REPRODUCING APPARATUS AND ITS AUTOMATIC EQUALIZATION MAXIMUM LIKELIHOOD DETECTING METHOD
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Patent #:
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Issue Dt:
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04/13/1999
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Application #:
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08562015
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Filing Dt:
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11/22/1995
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Title:
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MAGNETIC HEAD SLIDER WITH RAIL LEADING PORTIONS INCREASING IN THICKNESS OVER RAIL PORTIONS WHICH WIDEN AND NARROW
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Patent #:
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Issue Dt:
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06/09/1998
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Application #:
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08564880
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Filing Dt:
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11/30/1995
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Title:
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READ/WRITE APPARATUS AND ALTERNATION PROCESS METHOD
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Patent #:
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Issue Dt:
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12/09/1997
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Application #:
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08567315
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Filing Dt:
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12/05/1995
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Title:
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DISK APPARATUS FOR MONITORING ERROR BY SETTING TIMEOUT TIME UPON SEEK
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Patent #:
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Issue Dt:
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10/31/2000
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Application #:
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08568860
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Filing Dt:
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12/05/1995
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Title:
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AUTOMATIC CALIBRATION METHOD, READ APPARATUS AND STORAGE APPARATUS
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Patent #:
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Issue Dt:
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04/04/2000
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Application #:
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08570233
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Filing Dt:
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12/11/1995
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Title:
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REPRODUCTION APPARATUS USING MULTIPLE PARTIAL RESPONSE MAXIMUM LIKELIHOOD DETECTION SYSTEMS
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Patent #:
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Issue Dt:
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06/20/2000
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Application #:
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08573319
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Filing Dt:
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12/15/1995
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Title:
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HEAD ASSEMBLY HAVING A TABLE FOR STORING A HEAD OFFSET AND BIAS CURRENT
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Patent #:
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Issue Dt:
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10/13/1998
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Application #:
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08573592
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Filing Dt:
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12/15/1995
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Title:
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MAGNETIC CIRCUIT OF A VOICE COIL MOTOR
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Patent #:
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Issue Dt:
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10/20/1998
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Application #:
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08585023
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Filing Dt:
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01/11/1996
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Title:
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MAGNETIC HEAD SUSPENSION MECHANISM WITH A THIN FILM THEREON FOR CREATING A BENT PORTION OR A VIBRATION ABSORBING PORTION
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Patent #:
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Issue Dt:
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08/04/1998
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Application #:
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08588999
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Filing Dt:
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01/19/1996
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Title:
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ASYMMETRICAL SIGNAL DETECTOR AND SIGNAL REGENERATING APPARATUS USING THE SAME DETECTOR
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Patent #:
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Issue Dt:
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08/04/1998
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Application #:
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08593822
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Filing Dt:
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01/30/1996
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Title:
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DISK DRIVE HAVING OPTIMIZED OFF-TRACK COMPENSATION
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Patent #:
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Issue Dt:
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07/13/1999
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Application #:
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08595599
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Filing Dt:
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02/02/1996
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Title:
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DECODING CIRCUIT FOR A READ SIGNAL FROM A MAGNETIC RECORDING AND READING SYSTEM USING PARTIAL RESPONSE
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Patent #:
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Issue Dt:
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12/31/2002
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Application #:
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08596471
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Filing Dt:
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02/05/1996
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Title:
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DETECTING CIRCUIT FOR READ SIGNAL FROM MAGNETIC RECORDING SYSTEM USING PARTIAL RESPONSE
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Patent #:
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Issue Dt:
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05/11/1999
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Application #:
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08599808
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Filing Dt:
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02/12/1996
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Title:
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METHOD FOR RELIABLY POSITIONING A HEAD IN A DISK DRIVE TO A GUARD BAND AREA
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Patent #:
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Issue Dt:
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07/01/1997
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Application #:
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08602685
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Filing Dt:
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02/16/1996
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Title:
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MAGNETIC HEAD ASSEMBLY WITH THIN-FILM MAGNETIC HEAD AND FLEXIBLE SUPPORT MEMBER
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Patent #:
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Issue Dt:
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07/13/1999
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Application #:
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08603257
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Filing Dt:
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02/20/1996
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Title:
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METHOD OF MAKING A THIN FILM MAGNETIC HEAD SLIDER
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Patent #:
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Issue Dt:
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07/07/1998
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Application #:
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08608336
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Filing Dt:
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02/28/1996
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Title:
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EXTERNAL STORAGE DEVICE AND EXTERNAL STORAGE CONTROL DEVICE WITH MEANS FOR OPTIMIZING BUFFER FULL/EMPTY RATIO
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Patent #:
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Issue Dt:
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04/13/1999
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Application #:
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08617692
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Filing Dt:
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03/19/1996
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Title:
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MAGNETIC DISK APPARATUS AND METHOD THAT REVERSES SENSE CURRENT IN MAGNETORESISTIVE HEAD
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Patent #:
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Issue Dt:
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11/16/1999
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Application #:
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08617693
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Filing Dt:
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03/19/1996
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Title:
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WAVESHAPING CIRCUIT FOR SHAPING AN ANALOG WAVEFORM HAVING UNEQUAL POSITIVE AND NEGATIVE PEAK LEVELS SO THAT THE POSITIVE AND NEGATIVE PEAK LEVELS ARE EQUAL
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Patent #:
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Issue Dt:
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11/17/1998
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Application #:
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08623919
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Filing Dt:
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03/28/1996
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Title:
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STORAGE DEVICE AND RECORDING MEDIUM FORMATTING METHOD USING A PHASE SHIFT BETWEEN DATA SECTORS IN ADJACENT CYLINDERS
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Patent #:
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Issue Dt:
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02/10/1998
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Application #:
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08630993
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Filing Dt:
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04/12/1996
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Title:
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MAGNETIC MEMORY DEVICE
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Patent #:
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Issue Dt:
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11/03/1998
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Application #:
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08632009
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Filing Dt:
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04/15/1996
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Title:
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POWER SOURCE CONTROL CIRCUIT FOR CONTROLLING AN ELECTRIC POTENTIAL OF A MAGNETIC HEAD AND MEMORY APPARATUS USING SUCH A POWER SOURCE CONTROL CIRCUIT
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Patent #:
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Issue Dt:
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06/09/1998
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Application #:
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08636802
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Filing Dt:
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04/23/1996
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Title:
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HEAD ACTUATOR HAVING REDUCED AND CONTROLLED VIBRATION CHARACTERISTICS FOR HIGH SPEEN DISK DRIVE SYSTEM
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Patent #:
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Issue Dt:
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01/26/1999
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Application #:
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08641884
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Filing Dt:
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05/02/1996
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Title:
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DISK DRIVE WITH STOPPER MECHANISM INCLUDING A CUSHION MEMBER SEATED ON A CIRCUMFERENTIAL GROOVE
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Patent #:
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Issue Dt:
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05/26/1998
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Application #:
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08681660
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Filing Dt:
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07/29/1996
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Title:
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DISK APPARATUS, AND PHASE DEMODULATING DEVICE AND METHOD FOR A DISK APPARATUS
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Patent #:
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Issue Dt:
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01/12/1999
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Application #:
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08683062
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Filing Dt:
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07/16/1996
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Title:
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DISK STORAGE APPARATUS HAVING HEAD OVERSHOOT AND UNDERSHOOT CONTROL
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