Patent Assignment
Reel/Frame 004437/0373
Assignment of Assignors Interest.
Recorded: 1985-07-29
Pages: 3
Assignors
BAILEY, THOMAS F.
Executed: 1985-07-22
CAMPBELL, JOHN E.
Executed: 1985-07-22
SHAH, NEHAL M.
Executed: 1985-07-22
Assignee
A-Z INTERNATIONAL TOOL COMPANY A CORP OF TX
HOUSTON, TEXAS
Covered Property
(1)
Well String Cutting Apparatus
Patent:
4,646,826 →
Application:
06/759,737 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
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 →