IP Library Assignment 004424/0463
Patent Assignment
Reel/Frame 004424/0463

Assignment of Assignors Interest.

Recorded: 1985-06-21 Pages: 2
Covered Property (1)
Early Gas Detection System for a Drill Stem Test
Patent: 4,392,377 →
Application: 06/305,947 →
Related Assignments (3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest. Sep 28, 1981
From: RANKIN, E. EDWARD
To: GEARHART INDUSTRIES, INC., A CORP. OF TX.
Reel/Frame 003932/0356 →
Assignment of Assignors Interest. Aug 8, 1988
From: HUGHES TOOL COMPANY
To: BAKER HUGHES INCORPORATED
Reel/Frame 005050/0861 →
Assignment of Assignors Interest. Sep 25, 1991
From: BAKER HUGHES INCORPORATED
To: BJ SERVICES COMPANY
Reel/Frame 005852/0291 →