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Publication of CH48120ApublicationCriticalpatent/CH48120A/fr
G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
G04F7/06—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator running only during the time interval to be measured, e.g. stopwatches
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Physics & Mathematics
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General Physics & Mathematics
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CH48120A1909-08-021909-08-02Compteur de temps avec avertisseur
CH48120A
(fr)