DIFF Subgroup
B21H 1/06 rings of restricted axial length (extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B5/00)
Introduced: September 1968
Title
Titles differ between systems:
IPC: rings of restricted axial length
CPC: rings of restricted axial length (extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B5/00)
Full Title
Full titles differ between systems:
IPC:
Making articles shaped as bodies of revolution > rings of restricted axial length
CPC:
Making articles shaped as bodies of revolution (rolling tubes B21B17/00 - B21B25/00) > rings of restricted axial length (extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B5/00)
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
Child Classifications
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