Patent Assignment
Reel/Frame 005089/0032
Assignment of Assignors Interest.
Recorded: 1989-01-31
Pages: 1
Assignor
SALLAS, JOHN J.
Executed: 1989-01-27
Assignee
HALLIBURTON GEOPHYSICAL SERVICES INC.,
7800 BANNER DRIVE,, A CORP. OF TX, DALLAS, TEXAS, 75251,
Covered Property
(1)
Marine Vibrator Tuneable Array
Patent:
4,918,668 →
Application:
07/304,786 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Merger
Nov 15, 1993
From: HALLIBURTON GEOPHYSICAL SERVICES, INC.
To: HALLIBURTON COMPANY
Reel/Frame 006777/0052 →
Assignment of Assignor's Interest
Mar 28, 1994
From: HALLIBURTON COMPANY
To: WESTERN ATLAS INTERNATIONAL, INC.
Reel/Frame 006970/0236 →
Assignment of Assignor's Interest
Mar 21, 2002
From: WESTERN ATLAS INTERNATIONAL, INC.
To: WESTERNGECO, L.L.C.
Reel/Frame 012729/0567 →