IP Library › Assignment 004274/0330
Patent Assignment
Reel/Frame 004274/0330

Assignment of Assignors Interest.

Recorded: 1984-03-14 Pages: 2
Assignors
BARR, JOHN D.
Executed: 1984-02-13
LAMB, HAYDN R.
Executed: 1984-02-13
Assignee
Covered Property (1)
Drill Bit Manufacturing Method
Patent: 4,605,157 →
Application: 06/575,555 →
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 →