Patent Assignment
Reel/Frame 031257/0078
Assignment of Assignor's Interest
Recorded: 2013-09-23
Pages: 4
Assignor
GREGOR, JOHN
Executed: 2011-03-23
Assignee
ION GEOPHYSICAL CORPORATION
2105 CITYWEST BOULEVARD, SUITE 400, HOUSTON, TEXAS, 77042-2839
Covered Property
(1)
Method and Apparatus for Geophysical Surveys
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.