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Total properties:
20
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Patent #:
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Issue Dt:
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02/02/1982
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Application #:
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06119186
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Filing Dt:
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02/06/1980
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Title:
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HYDRAULIC SHIELD-TYPE SUPPORT
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Patent #:
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Issue Dt:
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03/19/1985
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Application #:
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06466537
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Filing Dt:
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02/15/1983
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Title:
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3-PORT, 2-POSITION DIRECTIONAL CONTROL VALVE
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Patent #:
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Issue Dt:
|
12/10/1985
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Application #:
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06518128
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Filing Dt:
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07/29/1983
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Title:
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ARRANGEMENT FOR CONTROLLING AN ELECTRO-HYDRAULIC VALVE
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Patent #:
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Issue Dt:
|
11/12/1985
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Application #:
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06558457
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Filing Dt:
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12/06/1983
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Title:
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PRESSURE-LIMITING HYDRAULIC VALVE
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Patent #:
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Issue Dt:
|
07/01/1986
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Application #:
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06708032
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Filing Dt:
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03/01/1985
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Title:
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HYDRAULICALLY-CONTROLLED NON-RETURN VALVE
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Patent #:
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Issue Dt:
|
04/28/1987
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Application #:
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06765233
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Filing Dt:
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08/13/1985
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Title:
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PRESSURE-LIMITING VALVE
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Patent #:
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Issue Dt:
|
11/08/1988
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Application #:
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06825736
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Filing Dt:
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02/04/1986
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Title:
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PRESSURE-CONTROL VALVE
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Patent #:
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Issue Dt:
|
09/22/1987
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Application #:
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06920926
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Filing Dt:
|
10/16/1986
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Title:
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PROP CONTROL VALVE
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|
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Patent #:
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Issue Dt:
|
07/19/1988
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Application #:
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06931588
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Filing Dt:
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11/14/1986
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Title:
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CHANGE-OVER VALVE FOR HYDRAULIC WALKING MINE-ROOF SUPPORTS
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|
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Patent #:
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Issue Dt:
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10/25/1988
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Application #:
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07062834
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Filing Dt:
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06/16/1987
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Title:
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METHOD AND SYSTEM FOR THE PRODUCTION OF ELECTRICAL ENERGY BY MEANS OF A PRESSURE MEDIUM
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Patent #:
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Issue Dt:
|
08/01/1989
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Application #:
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07196685
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Filing Dt:
|
05/20/1988
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Title:
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HYDRAULIC VALVE ACTUATING DEVICE
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|
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Patent #:
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|
Issue Dt:
|
01/09/1990
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Application #:
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07299003
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Filing Dt:
|
01/19/1989
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Title:
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GROUP CONTROL MEANS FOR HYDRAULIC MINE-ROOF SUPPORTS
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|
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Patent #:
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Issue Dt:
|
10/23/1990
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Application #:
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07392551
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Filing Dt:
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08/11/1989
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Title:
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METHOD OF ELECTRO-HYDRAULIC CONTROL OF LONGWALL MINE UNITS
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|
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Patent #:
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Issue Dt:
|
04/30/1991
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Application #:
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07422537
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Filing Dt:
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10/17/1989
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Title:
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MULTIPOLE CONNECTOR FOR CONTROL DEVICES IN UNDERGROUND WORKING
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|
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Patent #:
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Issue Dt:
|
05/21/1991
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Application #:
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07422539
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Filing Dt:
|
10/17/1989
|
|
Title:
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ELECTROHYDRAULIC CONTROL MEANS FOR HYDRAULIC SELF-ADVANCING SUPPORT UNITS
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|
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|
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Patent #:
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Issue Dt:
|
09/17/1991
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Application #:
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07487380
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Filing Dt:
|
03/02/1990
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|
Title:
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INTRINSICALLY SAFE POWER SUPPLY UNIT
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|
|
|
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Patent #:
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Issue Dt:
|
01/26/1993
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Application #:
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07716924
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Filing Dt:
|
06/18/1991
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|
Title:
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CONTROL SYSTEM FOR LONGWALL FACE SUPPORT FRAMES
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|
|
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Patent #:
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|
Issue Dt:
|
01/04/1994
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Application #:
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07890272
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Filing Dt:
|
05/29/1992
|
|
Title:
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METHOD OF WORKING COAL SEAMS TO A DEFINED PRESET DEPTH OF CUTTING DURING PLOUGHING WITH A CUTTER
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|
|
|
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Patent #:
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|
Issue Dt:
|
11/08/1994
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Application #:
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08037839
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Filing Dt:
|
03/29/1993
|
|
Title:
|
METHOD OF MINING COAL SEAMS AT A DEFINED PRESET DEPTH OF CUTTING DURING PLOUGHING WITH A CUTTER
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|
|
|
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Patent #:
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|
Issue Dt:
|
03/28/1995
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Application #:
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08169027
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Filing Dt:
|
12/20/1993
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|
Title:
|
CONTROL DEVICE FOR MINE-ROOF SUPPORT
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