| 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} |
| 301 | DD | .~ Details of electrophonic musical instruments {keyboards applicable also to other musical instruments subclasses 1+ and 50+} {G10H 1/00} {9} |
| 303 | DD | .~.~ Recording/reproducing or transmission of music for electrophonic musical instruments {G10H 1/00R} {1} |
| 304 | | .~.~.~ In coded form {see also subclasses 375+} {G10H 1/00R2} {2} |
| 305 | DD | .~.~.~.~> On magnetic tape {G10H 1/00R2B} |
| 306 | DD | .~.~.~.~> Transmission between separate instruments or between individual components of a musical system {G10H 1/00R2C} {1} |