DIFF Subgroup
G04F 7/10 Means used apart from the time-piece for starting or stopping same
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Apparatus for measuring unknown time intervals by non-electric means > Means used apart from the time-piece for starting or stopping same
CPC:
Apparatus for measuring unknown time intervals by non-electric means (using fluidic means G04F13/06) > Means used apart from the time-piece for starting or stopping same
No child classifications to compare. This is a leaf node in both IPC and CPC.