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By simplified electrostatic sound generator, essentially characterized, because it only uses seven generating sub-elements to obtain the twelve semitones of the musical scale in its different octaves. (Machine-translation by Google Translate, not legally binding)
ES282216A1962-11-061962-11-06Simplified electrostatic sound generator (Machine-translation by Google Translate, not legally binding)
ExpiredES282216A1
(en)