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BRANDSTAETTER GEORG
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BRANDSTAETTER GEORG
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Publication of ES229103A1publicationCriticalpatent/ES229103A1/es
Piezo-Electric Transducers For Audible Bands
(AREA)
Details Of Audible-Bandwidth Transducers
(AREA)
Abstract
Mejoras en los teléfonos provistos de cápsula de micrófono y auricular con un cristal piezoeléctrico, caracterizados porque la cápsula de comunicación y audición se hace de una pieza y se introduce en el cuerpo hueco mediante un órgano de sujeción provisto de orificios para el sonido.
ES0229103A1956-05-111956-06-09Mejoras en los telefonos provistos de capsula de microfono y auricular con un cristal piezo-electrico
ExpiredES229103A1
(es)