IP Library Assignment 004121/0918
Patent Assignment
Reel/Frame 004121/0918

Assignment of Assignors Interest.

Recorded: 1983-01-31 Pages: 1
Assignor
CLARK, DAVID A.
Executed: 1983-01-21
Assignee
HUGHES TOOL COMPANY
P.O. BOX 2539, HOUSTON, TEXAS, 77001
Covered Property (1)
Self-Energizing Locking Mechanism
Patent: 4,469,172 →
Application: 06/462,581 →
Related Assignments (2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest. Aug 8, 1988
From: HUGHES TOOL COMPANY
To: BAKER HUGHES INCORPORATED
Reel/Frame 005050/0861 →
Security Interest Dec 5, 1989
From: VETCO GRAY INC.
To: CITIBANK, N.A., AS AGENT
Reel/Frame 005211/0237 →