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DIFF Subgroup
B21K 21/16

Remodelling hollow bodies with respect to the shape of the cross-section (remodelling end portions only B21K21/12)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Remodelling hollow bodies with respect to the shape of the cross-section

CPC: Remodelling hollow bodies with respect to the shape of the cross-section (remodelling end portions only B21K21/12)

Full Title

Full titles differ between systems:

IPC:

Making hollow articles not covered by any single one of groups > Remodelling hollow bodies with respect to the shape of the cross-section

CPC:

Making hollow articles not covered by a single preceding sub-group (essentially from sheet-metal or uniform thin-walled tubes B21D, e.g. B21D41/00, B21D51/00) > Remodelling hollow bodies with respect to the shape of the cross-section (remodelling end portions only B21K21/12)

No child classifications to compare. This is a leaf node in both IPC and CPC.