Patent classifications
G
PHYSICS
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G04
HOROLOGY
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G04F
TIME-INTERVAL MEASURING
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3/00
Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork
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G04F3/06
with electric driving mechanisms
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G04F3/08
Additional arrangements in connection with ordinary electric clocks for this purpose
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