DIFF Subgroup
B21D 13/04 by rolling
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Corrugating sheet metal, rods or profiles, or bending sheet metal, rods or profiles into wave form > by rolling
CPC:
Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form (tubes B21D15/00) > by rolling
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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