E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
77/35
E21B 17/03 (2006.01) B23B 31/00 (2006.01) B25D 17/02 (2006.01) B25D 17/08 (2006.01)
Patent
CA 1035172
Gartner Karl-Heinz
Kruger Wilm
Rumpp Gerhard
LandOfFree
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