E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 10/08 (2006.01) E21B 6/00 (2006.01) E21B 7/24 (2006.01) E21B 44/00 (2006.01) E21D 9/10 (2006.01)
Patent
CA 2313924
Optimization of eccentric impact superimposed counter-balanced roller bits for removing and splitting rocks, minerals and the like.
Bechem Klaus
Bechem Philip
Bechem Ulrich
Bechem Hannelore
Fetherstonhaugh & Co.
LandOfFree
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