IP Library Assignment 013238/0046
Patent Assignment
Reel/Frame 013238/0046

Assignment of Assignor's Interest

Recorded: 2002-08-27 Pages: 3
Assignor
TROTECHAUD, KEVIN
Executed: 2002-08-20
Assignee
COMPUTALOG LIMITED
150 - 6TH AVENUE S.W., CALGARY, ALBERTA, T2P 3Y7, CANADA
Covered Property (1)
Perforating Gun Firing Head with Vented Block for Holding Detonator
Patent: 6,742,602 →
Application: 10/228,892 →
Publication: US 2003/0041723
Related Assignments (5)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name Sep 22, 2004
From: COMPUTALOG LTD.
To: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
Reel/Frame 015819/0450 →
Change of Name Mar 6, 2006
From: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
To: PRECISION ENERGY SERVICES LTD.
Reel/Frame 017251/0762 →
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 →