Patent Assignment
Reel/Frame 004065/0973
Assignment of Assignors Interest.
Recorded: 1982-03-23
Pages: 1
Assignor
RANKIN, E. EDWARD
Executed: 1981-09-09
Assignee
H-G TESTING COMPANY
VENTURA, CALIFORNIA
Covered Property
(1)
Wireline Winch Mounting System
Patent:
4,428,421 →
Application:
06/301,772 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Sep 14, 1981
From: RANKIN, E. EDWARD
To: H-G TESTING COMPANY; A PARTNERSHIP BETWEEN HUGHES TESTING CORPORATION A CORP OF DE. AND GEARHART TESTING CORPORATION A CORP OF TX.
Reel/Frame 004101/0109 →
Assignment of Assignors Interest.
Aug 8, 1988
From: HUGHES TOOL COMPANY
To: BAKER HUGHES INCORPORATED
Reel/Frame 005050/0861 →
Assignment of Assignors Interest.
Sep 25, 1991
From: BAKER HUGHES INCORPORATED
To: BJ SERVICES COMPANY
Reel/Frame 005852/0291 →