IP Library › Assignment 004567/0492
Patent Assignment
Reel/Frame 004567/0492

Assignment of Assignors Interest.

Recorded: 1986-06-20 Pages: 1
Assignors
BARR, JOHN D.
Executed: 1986-06-18
MATTHIAS, TERRY R.
Executed: 1986-06-18
Assignee
NL INDUSTRIES, INC.
1230 AVENUE OF THE AMERICAS, A CORP. OF NEW JERSEY, NEW YORK, NEW YORK
Covered Property (1)
Rotary Drill Bits
Patent: 4,727,946 →
Application: 06/876,847 →
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 →