Patent Assignment
Reel/Frame 004060/0153
Assignment of Assignors Interest.
Recorded: 1981-08-14
Pages: 1
Assignor
CARLBERG, CHARLES E.
Executed: 1981-03-25
Assignee
BJ-HUGHES INC.
777 SOUTH POST OAK RD. #333, A CORP. OF DE, HOUSTON, TEXAS
Covered Property
(1)
Slip Setting Ring
Patent:
4,415,193 →
Application:
06/239,308 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Feb 22, 1983
From: BJ-HUGHES INC.,
To: HUGHES TOOL COMPANY, A CORP. OF DEL.
Reel/Frame 004098/0273 →
Assignment of Assignors Interest.
Aug 8, 1988
From: HUGHES TOOL COMPANY
To: BAKER HUGHES INCORPORATED
Reel/Frame 005050/0861 →
Assignment of Assignors Interest.
Aug 18, 1988
From: BAKER HUGHES INCORPORATED
To: HUGHES TOOL COMPANY-USA, A DE CORP.
Reel/Frame 004944/0763 →
Assignment of Assignors Interest.
Jan 17, 1989
From: HUGHES TOOL CONPANY-USA
To: VARCO INTERNATIONAL, INC., A CA. CORP.
Reel/Frame 005013/0843 →