| 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} |
| 379 | DD | .~.~ Using generation of basic tones {G10H 5/02} {3} |
| 383 | | .~.~.~ Tones generated by heterodyning {G10H 5/08} |