US PATENT SUBCLASS 984 / 148
.~ Accordions, concertinas, or the like; Keyboards therefor (keyboards for musical instruments in general subclass 61) {G10D 11/00}


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984 /   HD   MUSICAL INSTRUMENTS

100  DD  MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR {aspects of automatic actuation subclasses 200+; Combinations of microphones, pick-ups or amplifiers with musical instruments subclasses 300+; Sound-producing devices not regarded as musical instruments or parts thereof G10K} {G10D} {8}
148.~ Accordions, concertinas, or the like; Keyboards therefor (keyboards for musical instruments in general subclass 61) {G10D 11/00} {1}
149  DD  .~.~> Actions {G10D 11/02}