Patent Assignment
Reel/Frame 004061/0552
Assignment of Assignors Interest.
Recorded: 1982-11-15
Pages: 2
Assignor
ALLWIN, ROGER P.
Executed: 1982-09-16
Assignee
MWL TOOL AND SUPPLY COMPANY
A CORP. OF TX, MIDLAND, TEXAS
Covered Property
(1)
Barrier Tool for Polished Bore Receptacle
Patent:
4,482,014 →
Application:
06/397,680 →
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name
Dec 3, 1993
From: LINDSEY COMPLETION SYSTEMS, INC.
To: MASX ENERGY SERVICES GROUP, INC.
Reel/Frame 006783/0444 →
Assignment of Assignor's Interest
Jan 12, 1994
From: MASX ENERGY SERVICES GROUP, INC. (A DELAWARE CORPORATION)
To: SMITH INTERNATIONAL, INC. (A DELAWARE CORPORATION)
Reel/Frame 006822/0975 →