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MONTANER SOCIEDA ANONIMA
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MONTANER SOCIEDA ANONIMA
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Application filed by MONTANER SOCIEDA ANONIMAfiledCriticalMONTANER SOCIEDA ANONIMA
Priority to ES0203745ApriorityCriticalpatent/ES203745A1/es
Publication of ES203745A1publicationCriticalpatent/ES203745A1/es
Nuevo sistema de intercomunicadores, que se caracteriza por un doble circuito, que e un caso está formado por el altavoz del aparato central, en serie con el micrófono de un aparato secundario y fuente de alimentación, mientras que la palanca de inversiones mantiene en la posición de escucha.
ES0203745A1952-05-281952-05-28Un nuevo sistema de intercomunicadores
ExpiredES203745A1
(es)