E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 23/01 (2006.01) E21B 17/10 (2006.01) E21B 23/04 (2006.01) E21B 34/14 (2006.01) E21B 47/09 (2006.01)
Patent
CA 2196933
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Lorgen George M.
Milne John R.
Pape Gary J.
Pitman Malcolm D.
Rafferty Robin J.
Baker Hughes Incorporated
Sim & Mcburney
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