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WESTBURNE PETROLEUM & MINERALS LIMITED
Dissolved in July 1994.



HARZA ENGINEERING COMPANY INC
Merged with Montgomery Watson Inc in June 2001 to form MWH Global Inc



HAWKER SIDDLEY DYNAMIC ENGINEERING INC - HSDE
See Vosper Thornycroft Controls, Inc



HAMMOND ENGINEERING
Acquired by Blackmer in 1995.



HENNESSEY RENTAL TOOLS INC
Acquired by Basic Energy Services Inc. in August 2006.



HENRY VOGT MACHINE COMPANY
see Vogt-NEM, Inc.



C & H MANUFACTURING
Acquired by Dover Corporation in 2000.



HITEC ASA (NORWAY)
Acquired by National Oilwell Varco in 2000.



HOLT BEN CO
see C E Holt Company



HOLT MACHINERY COMPANY
Acquired by NationsRent Companies Inc in March 2000



GE TENSOR
See GE Energy



HOUSTON ATLAS INC
See Thermo Electron Process Instruments Division



HYDRO-STATIC TUBING TESTERS INC
Acquired by Basic Energy Services Inc. in August 2006.



HYTEC
See Owatonna Tool Company



IEW SYSTEMS INC
Acquired with parent ISS Compression Inc by Universal Compression Holdings Inc in March 2001, see Universal Compression Inc



INCO ALLOYS INTERNATIONAL INC
Purchased by Special Metals Corporation in 1998



INGERSOLL-DRESSER PUMPS
Acquired by Flowserve Corp in August 2000, see Flowserve Corp - Pump Division



INGRAM CACTUS COMPANY
Acquired by the Cooper Cameron Corp in 1996.



INNOVATIVE VALVE TECHNOLOGIES INC - INVATEC
Acquired by Flowserve Corp



INPUT / OUTPUT INC
Changed name to ION Geophysical Corp in September 2007.



INSTITUTE OF GAS TECHNOLOGY - IGT
see Gas Technology Institute (GTI)



INTEGRATED POWER SYSTEMS CORPORATION
Acquired by National Oilwell Varco in 2002.



INTERNATIONAL NITROGEN SERVICES LLC
Acquired by Weatherford International Inc in October 2001, see Weatherford International's Underbalanced Services Unit



INTERNATIONAL SOCIETY FOR MEASUREMENT AND CONTROL
See Instrument Society Of America



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