Patent Assignment
Reel/Frame 008788/0917
See Recording at Reel 010232, Frame 0502. Re-Record to Correct Serial Number That Was Erroneously Assigned by the Patent and Trademark Office.
Recorded: 1997-08-19
Pages: 2
Assignee
COMPUTALOG LIMITED
2140, 53 8TH AVENUE, GW, CALGARY, ALBERTA, T2P 3, CANADA
Covered Property
(1)
Pulser
Patent:
6,002,643 →
Application:
08/917,624 →
Related Assignments
(7)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Aug 19, 1997
From: TCHAKAROV, BORISLAV J.; SEUTTER, DANIEL C.
To: COMPUTALOG LIMITED
Reel/Frame 010232/0502 →
Change of Name
Jul 1, 2005
From: COMPUTALOG LTD.
To: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
Reel/Frame 017275/0188 →
Change of Name
Aug 3, 2005
From: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
To: PRECISION ENERGY SERVICES, LTD.
Reel/Frame 016345/0078 →
Change of Name
Feb 7, 2006
From: COMPUTALOG LTD.
To: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
Reel/Frame 017230/0980 →
Assignment of Assignor's Interest
Apr 21, 2006
From: PRECISION ENERGY SERVICES LTD.
To: PRECISION ENERGY SERVICES ULC
Reel/Frame 017507/0031 →
Assignment of Assignor's Interest
Apr 26, 2006
From: PRECISION ENERGY SERVICES ULC
To: WEATHERFORD CANADA PARTNERSHIP
Reel/Frame 017527/0191 →
Assignment of Assignor's Interest
May 22, 2017
From: WEATHERFORD CANADA PARTNERSHIP
To: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
Reel/Frame 042457/0086 →