Patent Assignment
Reel/Frame 005046/0612
Change of Name Effective January 1, 1989
Recorded: 1989-03-28
Pages: 5
Assignor
GEARHART INDUSTRIES, INC.
Executed: 1988-12-20
Assignee
Covered Property
(1)
Method and Apparatus for Seismic Exploration of Strata Surrounding a Borehole
Patent:
4,873,675 →
Application:
07/205,291 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Jun 10, 1988
From: PIGGIN, RICHARD H.
To: GEARHART INDUSTRIES, INC., A CORP. OF TEXAS
Reel/Frame 004902/0220 →
Assignment of Assignors Interest.
Jun 10, 1988
From: BARR, FREDERICK J. JR.
To: GEARHART INDUSTRIES, INC., A CORP. OF TEXAS
Reel/Frame 004902/0222 →
Assignment of Assignors Interest.
Jun 10, 1988
From: BEASLEY, THOMAS R.
To: GEARHART INDUSTRIES, INC., A CORP. OF TEXAS
Reel/Frame 004902/0224 →
Assignment of Assignor's Interest
Jul 18, 2000
From: DAILEY INTERNATIONAL, INC.
To: WEATHERFORD U.S. L.P.
Reel/Frame 010977/0150 →