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Priority to FR1310ApriorityCriticalpatent/FR1430973A/fr
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Publication of FR1430973ApublicationCriticalpatent/FR1430973A/fr
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/26—Devices for calling a subscriber
H04M1/30—Devices which can set up and transmit only one digit at a time
H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
H04M1/38—Pulses transmitted by a movement variably limited by the setting of a stop
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Engineering & Computer Science
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Signal Processing
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FR1310A1965-01-081965-01-08Dispositif pour la composition des numéros de téléphone
ExpiredFR1430973A
(fr)