X0202 4 2005-05-04 0 0000866609 INPUT OUTPUT INC IO 0001072813 LAPEYRE JAMES M JR 12300 PARC CREST DRIVE STAFFORD TX 77008 1 0 0 0 Common Stock 2005-05-04 4 A 0 5892 5.94 A 931076 D Common Stock 7905344 I Shares held by Laitram, LLC Common Stock 10500 I As co-trustee for children. Common Stock 82780 I By child Common Stock 82780 I By child Issued pursuant to the Input/Output, Inc. Non-Employee Directors' Retainer Plan. The reporting person has elected pursuant to Instruction 4(b)(iv) to Form 4, to report the entire amount of the interest of Laitram, L.L.C. and disclaims beneficial ownership of such shares except to the extent of his proportionate pecuniary interest therein. The Reporting Person disclaims beneficial ownership of all securities shown as indirectly owned by him. This Form 4 no longer reflects holdings by one of the Reporting Person's children who no longer shares his household. /s/ Debra A. Addington, Attorney-in-fact 2005-05-11