EX-21.1 4 h84834ex21-1.txt SUBSIDIARIES OF THE COMPANY 1 EXHIBIT 21.1 SUBSIDIARIES OF THE COMPANY
JURISDICTION OF ORGANIZATION --------------- Input/Output of Canada, Inc. ............................... Delaware I/O International, Inc. .................................... Delaware I/O Eastern, Inc. .......................................... Delaware I/O Holdings, Inc. ......................................... Delaware IPOP Management, Inc. ...................................... Delaware Global Charter Corporation.................................. Delaware I/O Sensors, Inc. .......................................... Delaware Microflow Analytical, Inc. ................................. Delaware Tescorp Seismic Products, Inc. ............................. Delaware I/O Cable, Inc. ............................................ Delaware I/O Exploration Products (U.S.A.), Inc. .................... Delaware Sensor Nederland B.V. .................................... Netherlands INCO Gravenhage, B.V. ................................. Netherlands HGS (India) Ltd. ......................................... India I/O Exploration Products (U.K.), Inc. ...................... Delaware I/O of Austin, Inc. ........................................ Delaware I/O Green Mountain, Inc. ................................... Delaware Global Charter S.A. ........................................ Argentina I/O Marine Systems, Inc. ................................... Louisiana I/O Marine Systems Ltd. .................................. United Kingdom