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Publication of FR727542ApublicationCriticalpatent/FR727542A/fr
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/26—Devices for calling a subscriber
H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
H04M1/272—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial
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FR727542D1931-11-191931-11-19Système de commande pour cadran d'appel de téléphone automatique
ExpiredFR727542A
(fr)