Patent Assignment
Reel/Frame 021265/0832
Assignment of Assignor's Interest
Recorded: 2008-07-21
Pages: 5
Assignor
NIKIFORUK, KEVIN J., MR.
Executed: 2008-07-16
Assignee
TESCO CORPORATION
3993 W. SAM HOUSTON PARKWAY N., SUITE 100, HOUSTON, TEXAS, 77043
Covered Property
(1)
Gate Valve and Method of Controlling Pressure During Casing-While-Drilling Operations
Related Assignments
(1)
Other recorded transfers of the patent in this record — the chain of ownership.