ES200674A1 - Improved improvements in electronic amplifiers for people with hearing loss (Machine-translation by Google Translate, not legally binding)
- Google Patents
Improved improvements in electronic amplifiers for people with hearing loss (Machine-translation by Google Translate, not legally binding)
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Improvements introduced in the electronic amplifiers for people with hearing loss characterized by being provided with a microphone two voltage amplifier valves a power amplifier valve and a rectifier valve for feeding said amplifier by the alternating or continuous current of the domestic lighting network . (Machine-translation by Google Translate, not legally binding)
ES0200674A1951-11-281951-11-28Improved improvements in electronic amplifiers for people with hearing loss (Machine-translation by Google Translate, not legally binding)
ExpiredES200674A1
(en)
Improvements in the means of automatic switching of the sense of the conversation in interparing apparatus (Machine-translation by Google Translate, not legally binding)