IP Library › Assignment 004340/0278
Patent Assignment
Reel/Frame 004340/0278

Assignment of Assignors Interest.

Recorded: 1984-04-13 Pages: 1
Assignor
BARR, JOHN D.
Executed: 1984-04-09
Assignee
NL INDUSTRIES INC.
1230 AVENUE OF THE AMERICAS, A CORP. OF NEW JERSEY, NEW YORK, NEW YORK
Covered Property (1)
Drag Bit and Cutters
Patent: 4,593,777 →
Application: 06/578,183 →
Related Assignments (2)
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 →