Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Making hollow articles not covered by any single one of groups > Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs

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) > Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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B21K 21/10 cone-shaped or bell-shaped articles, e.g. insulator caps IPC+CPC Available in IPC and CPC