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Individual
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Individual
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Priority to ES0073610UpriorityCriticalpatent/ES73610Y/en
Publication of ES73610UpublicationCriticalpatent/ES73610U/en
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Publication of ES73610YpublicationCriticalpatent/ES73610Y/en
Auxiliary receiving device for handsets characterized by comprising an envelope element of flexible material; of appropriate dimensions and configuration, which by simple pressure fits on the headset of the same, having practiced in its upper plane and in the center a hole coinciding with the one that it has. Perpendicular to this hole is another one provided with a fitting to which the end of a tube of suitable section is attached. In your case, it will have an amplifying membrane. (Machine-translation by Google Translate, not legally binding)
ES0073610U1959-05-111959-05-11
Auxiliary Receiving Device for Microphones
ExpiredES73610Y
(en)