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Patent Assignment Abstract of Title
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Total Assignments: 4
Patent #:
Issue Dt:
05/14/1985
Application #:
06542801
Filing Dt:
10/17/1983
Inventor:
BRUCE H. BURR
Title:
EARTH BORING BIT WITH PRESSURE COMPENSATING RIGID FACE SEAL
Assignment: 1
Reel/Frame:
004185/0739Recorded: 10/17/1983Pages: 1
Conveyance:
ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor:
Exec Dt:
10/13/1983
Assignee:
P.O. BOX 2539
HOUSTON, TEXAS 77001
Correspondent:
ROBERT A. FELSMAN
P. O. BOX 2539
HOUSTON, TX 77001
Assignment: 2
Reel/Frame:
004269/0060Recorded: 05/15/1984Pages: 28
Conveyance:
ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor:
Exec Dt:
03/30/1984
Assignee:
DELAWARE
Correspondent:
HUGHES TOOL COMPANY
P.O. BOX 2539
HOUSTON TX 77001
Assignment: 3
Reel/Frame:
005169/0319Recorded: 11/02/1988Pages: 3
Conveyance:
CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE OCTOBER 11, 1988 (DELAWARE)
Assignor:
Exec Dt:
10/06/1988
Assignee:
Correspondent:
FELSMAN, BRADLEY, GUNTER & DILLON
2600 CONTINENTAL PLAZA
777 MAIN STREET
FORT WORTH, TX 76102
Assignment: 4
Reel/Frame:
005169/0319Recorded: 11/02/1988Pages: 3
Conveyance:
CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE OCTOBER 11, 1988 (DELAWARE)
Assignor:
Exec Dt:
10/06/1988
Assignee:
Correspondent:
FELSMAN, BRADLEY, GUNTER & DILLON
2600 CONTINENTAL PLAZA
777 MAIN STREET
FORT WORTH, TX 76102

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