Patent Assignment
Reel/Frame 005129/0157
Assignment of Assignors Interest.
Recorded: 1989-07-07
Pages: 2
Assignee
DRILEX SYSTEMS, INC., A CORP. OF TX
HOUSTON, TEXAS
Covered Property
(1)
Detonation Assembly for Explosive Wellhead Severing System
Patent:
4,909,320 →
Application:
07/258,228 →
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 →