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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Main Group
B21F 3/00

Coiling wire into particular forms

Introduced: September 1968

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

Child Classifications

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  • B21F 3/08 to flat spiral IPC+CPC Available in IPC and CPC
  • B21F 3/10 to spirals other than flat, e.g. conical IPC+CPC Available in IPC and CPC
  • B21F 3/12 of interconnected helical springs IPC+CPC Available in IPC and CPC