ES140751A3 - Un instrumento musical emisor de sonidos producidos por modulación de corrientes eléctricas a la frecuencia correspondiente a las notas emitidas.
- Google Patents
Un instrumento musical emisor de sonidos producidos por modulación de corrientes eléctricas a la frecuencia correspondiente a las notas emitidas.
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ES140751A1935-12-111935-12-11Un instrumento musical emisor de sonidos producidos por modulación de corrientes eléctricas a la frecuencia correspondiente a las notas emitidas.
ExpiredES140751A3
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