DIFF Main Group
G04B 13/00 Gearwork
Introduced: September 1968
CPC subdivides this area 5x more granularly than IPC with 4 additional codes.
4 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G04B 13/02 Wheels; Pinions; Spindles; Pivots (bearings G04B31/00 ) +4 CPC IPC+CPC Available in IPC and CPC