Patent Assignment
Reel/Frame 020391/0332
Assignment of Assignor's Interest
Recorded: 2008-01-21
Pages: 7
Assignors
ETHRIDGE, ROGER E.
Executed: 2008-01-07
MANDINA, DAVID A.
Executed: 2008-01-11
O'NEAL, CHRISTOPHER S.
Executed: 2008-01-09
KAMENJASEVIC, DARKO
Executed: 2008-01-07
Assignee
GRANT PRIDECO, L.P.
400 N. SAM HOUSTON PARKWAY E., #900, HOUSTON, TEXAS, 77060
Covered Property
(1)
Acoustic Transducer Calibration Block and Method
Related Assignments
(1)
Other recorded transfers of the patent in this record — the chain of ownership.