CPC Subgroup
E21B 17/046 with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
Full Title
Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings > Couplings; joints > between rod and bit or between rod and rod > with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
1 direct subcode
Child Classifications
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