DIFF Subgroup
G04F 13/02 using optical means
Introduced: July 1974
Full Title
Full titles differ between systems:
IPC:
Apparatus for measuring unknown time intervals by means not provided for in groups > using optical means
CPC:
Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00 > using optical means
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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