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G04C13/00—Driving mechanisms for clocks by master-clocks
G04C13/02—Circuit arrangements; Electric clock installations
G04C13/021—Circuit arrangements; Electric clock installations master-slave systems using transmission of singular pulses for driving directly slave-clocks step by step
G04C13/026—Circuit arrangements; Electric clock installations master-slave systems using transmission of singular pulses for driving directly slave-clocks step by step by radio
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FR601973D1924-11-081924-11-08Procédé et dispositifs pour la distribution de l'heure
ExpiredFR601973A
(fr)