Patent Assignment
Reel/Frame 004556/0619
Assignment of Assignors Interest.
Recorded: 1986-06-10
Pages: 2
Assignee
Covered Property
(1)
Casing Patch Seal
Patent:
4,660,863 →
Application:
06/758,370 →
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 →