Patent Assignment
Reel/Frame 004969/0240
Assignment of Assignors Interest.
Recorded: 1987-12-21
Pages: 2
Assignor
MASCO CORPORATION
Executed: 1987-12-10
Assignee
DRILEX SYSTEMS, INC.
A TEXAS CORP., STATELESS
Covered Property
(1)
Whipstock Setting Method and Apparatus
Patent:
4,397,355 →
Application:
06/268,482 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
May 29, 1981
From: MC LAMORE, ROY T.
To: MASCO CORPORATION
Reel/Frame 003893/0140 →
Change of Name
Nov 18, 1993
From: A-Z INTERNATIONAL TOOL CO., INC.
To: DRILEX SYSTEMS, INC.
Reel/Frame 006772/0238 →
Assignment of Assignor's Interest
Dec 3, 1993
From: DRILEX SYSTEMS, INC.
To: MASX ENERGY SERVICES GROUP, INC.
Reel/Frame 006782/0769 →
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 →