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Patent Assignment Details
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Reel/Frame:005452/0701   Pages: 5
Recorded: 09/28/1990
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Total properties: 12
1
Patent #:
Issue Dt:
03/11/1986
Application #:
06566962
Filing Dt:
12/29/1983
Title:
SOLID HEAD BIT WITH TUNGSTEN CARBIDE CENTRAL CORE
2
Patent #:
Issue Dt:
07/29/1986
Application #:
06618113
Filing Dt:
06/07/1984
Title:
DIAMOND DRILL BIT WITH VARIED CUTTING ELEMENTS
3
Patent #:
Issue Dt:
08/05/1986
Application #:
06656825
Filing Dt:
10/02/1984
Title:
REPLACEABLE BIT NOZZLE
4
Patent #:
Issue Dt:
05/26/1987
Application #:
06867343
Filing Dt:
05/23/1986
Title:
MATRIX BIT WITH EXTENDED BLADES
5
Patent #:
Issue Dt:
09/29/1987
Application #:
06880214
Filing Dt:
06/30/1986
Title:
DRILLING BIT WITH FULL RELEASE VOID AREAS
6
Patent #:
Issue Dt:
08/11/1987
Application #:
06893112
Filing Dt:
08/04/1986
Title:
METHOD OF HARDFACING STEEL BODIED BITS
7
Patent #:
Issue Dt:
12/22/1987
Application #:
07042546
Filing Dt:
04/23/1987
Title:
DIAMOND DRILL BIT WITH CO-JOINED CUTTERS
8
Patent #:
Issue Dt:
11/03/1987
Application #:
07046204
Filing Dt:
05/04/1987
Title:
EARTH BORING BIT HAVING A REPLACEABLE, THREADED NOZZLE WITH WRENCH SOCKET
9
Patent #:
Issue Dt:
03/27/1990
Application #:
07346924
Filing Dt:
05/03/1989
Title:
POLYCRYSTALLINE DIAMOND CUTTING ELEMENT WITH MATING RECESS
10
Patent #:
Issue Dt:
07/17/1990
Application #:
07409706
Filing Dt:
09/20/1989
Title:
ONE-PIECE DRILL BIT WITH IMPROVED GAGE DESIGN
11
Patent #:
Issue Dt:
04/16/1991
Application #:
07484406
Filing Dt:
02/23/1990
Title:
DRILL BIT HAVING IMPROVED CUTTING ELEMENT RETENTION SYSTEM
12
Patent #:
Issue Dt:
12/03/1991
Application #:
07484510
Filing Dt:
02/23/1990
Title:
DIAMOND DRILL BIT WITH VARIED CUTTING ELEMENTS
Assignor
1
Exec Dt:
06/20/1990
Assignee
1
1600 PACIFIC, A DE CORP.
DALLAS, TEXAS 75201
Correspondence name and address
ROBERT A. FELSMAN
PATS. AND TECHNOLOGY MGMNT.
HUGHES TOOL COMPANY
P. O. BOX 2539
HOUSTON, TX 77001

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