| 984 / | HD | MUSICAL INSTRUMENTS |
| 1 | DD | ORGANS; HARMONIUMS {mouth organs or accordions subclasses 100+; Aspects of automatic actuation subclasses 200+; Combinations of microphones, pick-ups or amplifiers with musical instruments, electric organs subclasses 300+} {G10B} {2} |
| 7 | DD | .~ Details of, accessories for, organs, harmoniums, or the like {G10B 3/00} {11} |
| 15 | | .~.~ Swell chambers; Accentuating means {G10B 3/16} |