U.S. Army Corps of Engineers as represented by the Secretary of
U.S. Oil Company, Incorporated
U.S. Saws, Inc.
Ubbink Barney
Ugrich Steven L.
Ugwuocha Sharp Okorie
Uitto Vesa
Ultidrill B.V.
Ultrasonic Processors Limited
Umbach Daniel T.
Umphrey Ronald W.
Underbalanced Drilling Systems Limited
Underground Technologies
Underground Technologies, Inc.
Underwood Lance D.
Underwood Robert Lewis
Unglert Peter Josef
Union Pacific Resources Company
Unique Oil Tools, Inc.
Uniroc Aktiebolag