DIFF Subgroup
B21D 15/10 by applying fluid pressure
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Corrugating tubes > transversely, e.g. helically > by applying fluid pressure
CPC:
Corrugating tubes (wrinkle-bending using mandrels or the like B21D9/14) > transversely, e.g. helically > by applying fluid pressure
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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