Patent Assignment
Reel/Frame 008507/0514
Assignment of Assignor's Interest
Recorded: 1997-04-15
Pages: 3
Assignee
CANADIAN DOWNHOLE DRILL SYSTEMS INC.
1802 - 4TH STREET, NISKU, ALBERTA, T6H 4, CANADA
Covered Property
(1)
Method and Apparatis Fpr Retrieving Downhole Tools
Patent:
5,971,078 →
Application:
08/839,573 →
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
Jul 2, 2009
From: NQL ENERGY SERVICES CANADA LTD.
To: SMITH INTERNATIONAL CANADA, LTD.
Reel/Frame 022902/0740 →