| 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} |
| 344 | | .~.~ Constructional details {G10H 1/32} {1} |
| 345 | DD | .~.~.~> Switch arrangements, e.g., keyboards or mechanical swicthes peculiar to electrophonic musical instruments, etc. {keyboards applicable also to other musical instruments Subclasses 1+ and 50+} subclasses 316+ takes precedence} {G10H 1/34} {1} |