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PCE
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DIFF Subgroup
B28B 21/56

incorporating reinforcements

Introduced: September 1968

Full Title

Methods or machines specially adapted for the production of tubular articles > incorporating reinforcements

Of 5 combined children, 3 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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  • B28B 21/563 CPC only CPC only
  • B28B 21/566 CPC only CPC only
  • B28B 21/58 Steel tubes IPC+CPC Available in IPC and CPC
  • B28B 21/68 and applying centrifugal forces IPC+CPC Available in IPC and CPC