Patent Assignment
Reel/Frame 005241/0003
Assignment of Assignors Interest.
Recorded: 1990-02-26
Pages: 2
Assignee
HALLIBURTON GEOPHYSICAL SERVICES, INC.
A CORP. OF DE, HOUSTON, TEXAS
Covered Property
(1)
Reinforcement of Surface Seismic Wavefields
Patent:
4,935,903 →
Application:
07/398,813 →
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 →