Patent Assignment
Reel/Frame 005140/0835
Assignment of Assignors Interest.
Recorded: 1989-09-18
Pages: 2
Assignee
Covered Property
(1)
Geothermal Wellhead Repair Unit
Patent:
4,984,636 →
Application:
07/313,688 →
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Nov 18, 1993
From: DRILEX SYSTEMS, INC.
To: MASX ENERGY SERVICES GROUP, INC.
Reel/Frame 006767/0963 →
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 →