Patent Assignment
Reel/Frame 004232/0112
Assignment of Assignors Interest.
Recorded: 1984-03-14
Pages: 2
Assignor
BARR, JOHN D.
Executed: 1984-02-22
Assignee
NL INDUSTRIES, INC., A CORP OF NJ
1230 AVENUE OF THE AMERICAS, NEW YORK, NEW YORK
Covered Property
(1)
Drag Bit and Cutters
Patent:
4,558,753 →
Application:
06/468,669 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Jul 5, 1990
From: NL INDUSTRIES, INC.
To: CAMCO, INCORPORATED, A CORP. OF TX
Reel/Frame 005370/0475 →
Merger
Jul 9, 1990
From: CAMCO, INCORPORATED, A CORP. OF TX.
To: CAMCO INTERNATIONAL INC., A CORP. OF DE
Reel/Frame 005366/0664 →
Merger
Oct 24, 2002
From: CAMCO INTERNATIONAL INC.
To: SCHLUMBERGER TECHNOLOGY CORPORATION
Reel/Frame 013417/0342 →
Assignment of Assignor's Interest
Nov 22, 2002
From: SCHLUMBERGER TECHNOLOGY CORPORATION
To: REED HYCALOG OPERATING LP
Reel/Frame 013506/0905 →