DIFF Subgroup
B21D 28/12 Punching using rotatable carriers
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Shaping by press-cutting; Perforating > Punching blanks or articles with or without obtaining scrap; Notching > Punching using rotatable carriers
CPC:
Shaping by press-cutting; Perforating > Punching blanks or articles with or without obtaining scrap (cutting nails or pins from strips or sheet material B21G3/26); Notching > Punching using rotatable carriers
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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