Patent Assignment
Reel/Frame 006080/0305
Assignment of Assignors Interest.
Recorded: 1992-04-10
Pages: 4
Assignee
CANADIAN DOWHOLE DRILL SYSTEMS INC.
1802-4TH STREET, P.O. BOX 602, NISKU, ALBERTA, TOC 2GO, CANADA
Covered Property
(1)
Short Stack Bearing Assembly
Patent:
5,248,204 →
Application:
07/835,595 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Security Agreement
Sep 12, 2003
From: CANADIAN DOWNHOLE DRILL SYSTEMS INC.
To: CANADIAN IMPERIAL BANK OF COMMERCE
Reel/Frame 014506/0446 →
Assignment of Assignor's Interest
Jul 23, 2004
From: CANADIAN DOWNHOLE DRILL SYSTEMS INC.
To: NQL ENERGY SERVICES CANADA LTD.
Reel/Frame 014892/0194 →
Assignment of Assignor's Interest
Apr 30, 2008
From: NQL ENERGY SERVICES CANADA LTD.
To: NATIONAL OILWELL VARCO, L.P.
Reel/Frame 020876/0333 →