X0202 4 2004-09-13 0 0000866609 INPUT OUTPUT INC IO 0001072813 LAPEYRE JAMES M JR 12300 PARC CREST DRIVE STAFFORD TX 77008 1 0 0 0 Common Stock 2004-09-13 4 A 0 2968 0.00 A 791184 D Common Stock 7655344 I Shares held by Laitram, LLC Common Stock 30000 I By spouse Common Stock 12780 I By minor child Common Stock 10000 I As custodian for minor child Common Stock 10500 I As co-trustee for children Common Stock 22780 I By child Common Stock 22780 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. /s/ Debra A. Addington, Attorney-in-fact 2004-09-15