X0202 4 2004-11-04 0 0000866609 INPUT OUTPUT INC IO 0001072813 LAPEYRE JAMES M JR 12300 PARC CREST DRIVE STAFFORD TX 77008 1 0 0 0 Common stock 2004-11-04 4 P 0 8700 6.90 A 799884 D Common Stock 2004-11-04 4 P 0 500 6.91 A 800384 D Common Stock 2004-11-04 4 P 0 10000 6.94 A 810384 D Common Stock 2004-11-04 4 P 0 14500 6.95 A 824884 D Common Stock 2004-11-04 4 P 0 6000 6.96 A 830884 D Common Stock 2004-11-04 4 P 0 2200 6.97 A 833084 D Common Stock 2004-11-04 4 P 0 4100 6.99 A 837184 D Common Stock 2004-11-04 4 P 0 4000 7.00 A 841184 D Common Stock 2004-11-04 4 P 0 100 6.87 A 22880 I By child Common Stock 2004-11-04 4 P 0 200 6.88 A 23080 I By child Common Stock 2004-11-04 4 P 0 4900 6.93 A 27980 I By child Common Stock 2004-11-04 4 P 0 4800 6.95 A 32780 I By child Common Stock 2004-11-04 4 P 0 5000 6.98 A 37780 I By child Common Stock 2004-11-04 4 P 0 100 6.89 A 22880 I By child Common Stock 2004-11-04 4 P 0 800 6.93 A 23680 I By child Common Stock 2004-11-04 4 P 0 1300 6.95 A 24980 I By child Common Stock 2004-11-04 4 P 0 1000 6.98 A 25980 I By child Common Stock 2004-11-04 4 P 0 9100 6.99 A 35080 I By child Common Stock 2004-11-04 4 P 0 2700 7.00 A 37780 I By child Common Stock 2004-11-04 4 P 0 6100 6.93 A 28880 I By child Common Stock 2004-11-04 4 P 0 5000 6.94 A 33880 I By child Common Stock 2004-11-04 4 P 0 3900 6.97 A 37780 I By child The Reporting Person disclaims beneficial ownership of all securities shown as indirectly owned by him. /s/ Debra A. Addington, Attorney-in-fact 2004-11-05