Patent Assignment
Reel/Frame 005230/0614
Assignment of Assignors Interest.
Recorded: 1990-02-06
Pages: 1
Assignor
MAURER ENGINEERING, INC.
Executed: 1990-01-31
Covered Property
(1)
Earth Drilling Apparatus with Control Valve
Patent:
4,936,397 →
Application:
07/328,890 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Merger
Feb 18, 1997
From: SLIMDRIL INTERNATIONAL INC., A TEXAS CORPORATION
To: PHOENIX DRILLING SERVICE, INC.
Reel/Frame 009367/0433 →
Assignment of Assignor's Interest
Aug 5, 1998
From: PHOENIX DRILLING SERVICES, INC.
To: BLACK WARRIOR WIRELINE CORP.
Reel/Frame 010078/0656 →
Security Interest
Feb 26, 1999
From: BLACK WARRIOR WIRELINE CORP.
To: FLEET CAPITAL CORPORATION
Reel/Frame 009781/0784 →
Release
Mar 2, 2000
From: FLEET CAPITAL CORPORATION
To: BLACK WARRIOR WIRELINE CORP.
Reel/Frame 010572/0514 →