DIFF Main Group
B21B 21/00 Pilgrim-step tube-rolling
Introduced: September 1968
Of 4 combined children, 3 exist in both systems.
1 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
Navigate with arrow keys, Enter to open
- B21B 21/04 Pilgrim-step feeding mechanisms (B21B21/06 takes precedence) +1 CPC IPC+CPC Available in IPC and CPC