Change of Name

Recorded: 2007-10-04 Received: 2007-10-04 Pages: 2

Assignor

INPUT/OUTPUT, INC.

Executed: 2007-09-21

Assignee

ION GEOPHYSICAL CORPORATION

2105 CITYWEST BOULEVARD, HOUSTON, TX, 77042-2839, UNITED STATES

Covered Properties (3)

Birdcage Attachment

Application: 29/291,517 →

One Touch Data Acquisition

Application: 11/760,122 →

One touch data acquisition

Application: 60/812,467 →