DIFF Subgroup
B21H 1/02 discs; disc wheels
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Making articles shaped as bodies of revolution > discs; disc wheels
CPC:
Making articles shaped as bodies of revolution (rolling tubes B21B17/00 - B21B25/00) > discs; disc wheels
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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