Patent Assignment
Reel/Frame 004234/0256
Assignment of Assignors Interest.
Recorded: 1984-03-12
Pages: 2
Assignor
PATENT SPECIALTIES, INC.
Executed: 1984-03-03
Assignee
PARKO SERVICES, INC.
231 INDUSTRIAL PARKWAY, (P.O. BOX 52302, LAFAYETTE 70505 A CORP. OF LA., LAFAYETTE, LOUISIANA, 70508
Covered Property
(1)
Mud Retaining Valve
Patent:
4,128,108 →
Application:
05/789,018 →
Related Assignments
(5)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Mar 12, 1984
From: AMERICAN INTERNATIONAL TOOL CO., INC.
To: PATNET SPECIALTIES, INC.
Reel/Frame 004234/0258 →
Assignment of Assignors Interest.
Mar 4, 1985
From: PARKO SERVICES, INC.
To: A-Z INTERNATIONAL TOOL COMPANY, A CORP OF TX
Reel/Frame 004368/0897 →
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 →