US PATENT SUBCLASS 984 / 356
.~.~ Using mechanical interrupters {G10H 3/02}


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984 /   HD   MUSICAL INSTRUMENTS

300  DD  ELECTRONIC MUSICAL INSTRUMENTS {structural combinations of microphones, pick-ups, or amplifiers with musical instruments subclasses 1+, 50+, and 100+; Instruments in which each note is generated by a different individually-actuated mechanical resonating structure and is amplified electrically subclasses 50+; Instruments in which each note is produced by a different electrically-vibrated sounding element subclasses 100+; Electronic circuits in general H03. {G10H} {4}
355  DD  .~ Instruments in which the tones are generated by electromechanical means {G10H 3/00} {3}
356.~.~ Using mechanical interrupters {G10H 3/02}