DIFF Subgroup
B21D 15/02 longitudinally
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Corrugating tubes > longitudinally
CPC:
Corrugating tubes (wrinkle-bending using mandrels or the like B21D9/14) > longitudinally
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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