E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
31/52, 166/54
E21B 43/28 (2006.01) C09K 8/54 (2006.01) E21B 21/00 (2006.01) E21B 41/02 (2006.01)
Patent
CA 920507
Edwin E. Claytor Jr.
Simms David W.
Amoco Canada Petroleum Company Ltd.
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