Patent Assignment
Reel/Frame 022349/0474
Assignment of Assignor's Interest
Recorded: 2009-03-05
Pages: 7
Assignor
BERTHOLD, JOHN W.
Executed: 2007-03-28
Assignee
DAVIDSON INSTRUMENTS, INC.
8301 NEW TRAILS DRIVE, THE WOODLANDS, TEXAS, 77381
Covered Property
(1)
Fiber Optic Mems Seismic Sensor with Mass Supported by Hinged Beams
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Nov 12, 2007
From: DAVIDSON INSTRUMENTS INC.
To: DAVIDSON ENERGY INC.
Reel/Frame 020095/0589 →
Assignment of Assignor's Interest
Jan 26, 2009
From: DAVIDSON ENERGY, INC.; DAVIDSON INSTRUMENTS, INC.
To: HALLIBURTON ENERGY SERVICES, INC.
Reel/Frame 022157/0305 →
Assignment of Assignor's Interest
Feb 15, 2011
From: ZHOU, TIANSHENG
To: PRECISELEY MICROTECHNOLOGY CORP.
Reel/Frame 025808/0530 →