Patent classifications
G
PHYSICS
Load children
G04
HOROLOGY
Load children
G04F
TIME-INTERVAL MEASURING
Load children
7/00
Apparatus for measuring unknown time intervals by non-electric means
Load children Filter patents View analytics View as hierarchy
G04F7/04
using a mechanical oscillator
Load children Filter patents View analytics View as hierarchy
G04F7/06
running only during the time interval to be measured, e.g. stopwatches
Load children Filter patents View analytics View as hierarchy