US PATENT SUBCLASS 984 / 377
.~.~ Instruments using voltage controlled oscillators and amplifiers or voltage controlled oscillators or filters, e.g., synthesizers, etc. {G10H 5/00B}


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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}
376  DD  .~ Instruments in which the tones are generated by means of electronic generators {subclass 388 takes precedence} {G10H 5/00} {6}
377.~.~ Instruments using voltage controlled oscillators and amplifiers or voltage controlled oscillators or filters, e.g., synthesizers, etc. {G10H 5/00B}