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Individual
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Individual
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Priority to ES0297724ApriorityCriticalpatent/ES297724A3/en
Publication of ES297724A3publicationCriticalpatent/ES297724A3/en
"AMPLIFIER APPARATUS ADAPTABLE TO TELEPHONE RECEIVERS", which is characterized by comprising an electronic amplifier circuit, whose terminal elements are a sensitive microphone and a loudspeaker, powered by one or more electric batteries, all housed inside a box, which presents an area suitably shaped to allow easy adaptation and support of the handset of a conventional telephone set, in which zone the sensitive microphone is located, so that said headset is very close to it, so that it can pick up the sounds emitted by the headset , whose sounds are amplified by the electronic circuit and reproduced with greater volume by the high speaker that is located in a place in the box opposite the sensitive microphone. (Machine-translation by Google Translate, not legally binding)
ES0297724A1964-03-171964-03-17Amplifier appliance adaptable to telephone receivers (Machine-translation by Google Translate, not legally binding)
ExpiredES297724A3
(en)