E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
137/71, 61/5.8
E21B 17/01 (2006.01) B67D 7/78 (2010.01) B63B 22/02 (2006.01) B63B 27/24 (2006.01) E02D 29/09 (2006.01)
Patent
CA 978380
Arcache Alfred S.
Haring Robert E.
Ortloff John E.
Exxon Production Research Company
Na
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