Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ducati Elettrotecnica SpA
Original Assignee
Ducati Elettrotecnica SpA
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Filing date
Publication date
Application filed by Ducati Elettrotecnica SpAfiledCriticalDucati Elettrotecnica SpA
Priority to ES0234806ApriorityCriticalpatent/ES234806A3/es
Publication of ES234806A3publicationCriticalpatent/ES234806A3/es
Soundproofing, Sound Blocking, And Sound Damping
(AREA)
Interconnected Communication Systems, Intercoms, And Interphones
(AREA)
Abstract
Dispositivo eliminador de ruidos de llamada en aparatos interfónicos, caracterizado por el hecho de que las conmutaciones de llamada tienen lugar con el altavoz desconectado del amplificador del puesto principal, la conexión ocurre después que las conmutaciones de llamada han sido ya ejecutadas y después que la línea de conversación ha sido vuelta a unir con el circuito de entrada del amplificador.
ES0234806A1957-04-111957-04-11Dispositivo eliminador de ruidos de llamada en aparatos interfënicos
ExpiredES234806A3
(es)