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ENERTEC CORPORATION
Reorganized as Enertec Inc under Chapter 11 of the Bankruptcy Code in December 1994



RPC ENERGY SERVICES
Name changed to RPC Inc after 1984



SKYGEN ENERGY
Acquired by Calpine Corporation in October 2000.



SOUTH TEXAS DRILLING & EXPLORATION INC
Changed name to Pioneer Drilling Company in August 2001.



SPYGLASS INC
Purchased by OpenTV on March 26, 2000.



TOTAL PETROLEUM INC
Acquired by Ultramar Diamond Shamrock Inc in September 1997 and renamed TPI Petroleum Inc.



ULTRAMAR DIAMOND SHAMROCK CORPORATION
Acquired by Valero Energy Corp in December 2001.



HART SALES COMPANY
Acquired by National Oilwell Varco in 2000.



COM C CONSULTANTS
Out of business in 2007.



ENSOURCE ENERGY SERVICES INC
Acquired by Enerflex Systems Ltd in July 2002.



TEMEX
Acquired by Dover Corporation in 2003.



A-C COMPRESSOR CORPORATION
See Pignone Inc.



CURT MAY
Acquired by Dover Corp's Imaje in 2003.



WABASH MAGNETICS CONTROL
Acquired by Dover Corporation in 2003.



ACCESS RESEARCH CORP
Acquired by EADS North America Defense Company in July 2001. See EADS Company.



BLITZ M SCHNEIDER GMBH
Acquired by Dover Corporation in 2003.



KESSELTRONICS SYSTEMS
Acquired by Dover Corporation in 2000.



ACID ENGINEERING INC
Acquired by BJ Services in November 1993.



TEMPFLEX
Acquired by Flexonics. See Senior Flexonics Inc.



ADVANCE GEOPHYSICAL CORPORATION
Acquired by Landmark Graphics Corp in 1994.



AGEMA INFRARED SYSTEMS LIMITED
Acquired by FLIR Systems in December 1997.



AGRA EQUIPMENT COMPANY
Assets purchased by Mesa Products Inc in 1989.



AGRA INC
See AMEC Inc.



AIR RELIEF INC
Acquired by Gardner Denver Inc in October 1999



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