Patent Assignment
Reel/Frame 014447/0685
Assignment of Assignor's Interest
Recorded: 2003-08-27
Pages: 3
Assignors
WISLER, MACMILLAN
Executed: 2003-07-28
WU, JIAN-QUN
Executed: 2003-07-28
WEISBECK, DENIS
Executed: 2003-07-28
Assignee
PRECISION DRILLING TECHNOLOGY SERVICES GROUP INC.
4200, 150 - 6TH AVENUE SW, CALGARY, ALBERTA, T2P 3Y7, CANADA
Covered Property
(1)
Electromagnetic Mwd Telemetry System Incorporating a Current Sensing Transformer
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name
Apr 21, 2006
From: PRECISION DRILLING TECHNOLOGY SERVICES GROUP INC.
To: PRECISION ENERGY SERVICES LTD.
Reel/Frame 017507/0063 →
Assignment of Assignor's Interest
Apr 24, 2006
From: PRECISION ENERGY SERVICES LTD.
To: PRECISION ENERGY SERVICES ULC
Reel/Frame 017519/0043 →
Assignment of Assignor's Interest
Apr 26, 2006
From: PRECISION ENERGY SERVICES ULC
To: WEATHERFORD CANADA PARTNERSHIP
Reel/Frame 017527/0191 →