B - Operations – Transporting – 25 – B
Patent
B - Operations, Transporting
25
B
B25B 13/50 (2006.01) E21B 19/06 (2006.01) E21B 19/16 (2006.01)
Patent
CA 2705468
A power tong with a cable operated door jammer valve for shutting off the hydraulic supply of a power tong when the door is opened
Barker Marcin K.
Feigel Kurt R. Jr.
Barker Marcin K.
Feigel Kurt R. Jr.
Lambert Anthony R.
LandOfFree
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