Patent Assignment
Reel/Frame 014069/0593
Assignment of Assignor's Interest
Recorded: 2003-05-16
Pages: 5
Assignors
DOPF, ANTHONY R.
Executed: 2003-04-29
CAMWELL, PAUL L.
Executed: 2003-04-29
SIEMENS, WENDALL L.
Executed: 2003-04-29
LOGAN, DEREK W
Executed: 2003-04-29
Assignee
EXTREME ENGINEERING LTD.
BAY 8 6025 - 12TH STREET SOUTHEAST, CALGARY, AB, T2H 2K1, CANADA
Covered Property
(1)
Apparatus for Receiving Downhole Acoustic Signals
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Aug 31, 2004
From: EXTREME ENGINEERING LTD.
To: XACT DOWNHOLE TELEMETRY INC.
Reel/Frame 015751/0444 →
Assignment of Assignor's Interest
Jun 19, 2019
From: XACT DOWNHOLE TELEMETRY INC.
To: BAKER HUGHES CANADA COMPANY
Reel/Frame 049513/0022 →
Assignment of Assignor's Interest
Jun 19, 2019
From: BAKER HUGHES CANADA COMPANY
To: BAKER HUGHES OILFIELD OPERATIONS LLC
Reel/Frame 049519/0660 →
Assignment of Assignor's Interest
Dec 23, 2020
From: XACT DOWNHOLE TELEMETRY LLC
To: BAKER HUGHES OILFIELD OPERATIONS LLC
Reel/Frame 054735/0712 →