DIFF Subgroup
B28B 21/92 Methods or apparatus for treating or reshaping
Introduced: September 1968
Full Title
Methods or machines specially adapted for the production of tubular articles > Methods or apparatus for treating or reshaping
Of 4 combined children, 3 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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- B28B 21/94 for impregnating or coating by applying liquids or semi-liquids IPC+CPC Available in IPC and CPC
- B28B 21/96 for smoothing, roughening, corrugating or for removing burr +1 CPC IPC+CPC Available in IPC and CPC