Patent Assignment
Reel/Frame 006587/0582
Assignment of Assignor's Interest
Recorded: 1993-06-25
Pages: 4
Assignors
LIVINGSTONE, RAYMOND S. S.
Executed: 1993-04-28
LIVINGSTONE, RAYMOND D.
Executed: 1993-04-28
Assignee
CANADIAN DOWNHOLE DRILL SYSTEMS, INC.
P.O. BOX 602, NISKU ALBERTA TOC 2GO, CANADA
Covered Property
(1)
Adjustable Bent Sub
Patent:
5,125,463 →
Application:
07/636,433 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Release
Mar 2, 2000
From: FLEET CAPITAL CORPORATION
To: BLACK WARRIOR WIRELINE CORP.
Reel/Frame 010572/0514 →
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 →