US PATENT SUBCLASS 984 / 203
.~.~ Pianofortes which have no keyboard {G10F 1/04}

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984 /   HD   MUSICAL INSTRUMENTS

200  DD  AUTOMATIC MUSICAL INSTRUMENTS nonmusical aspects of toy instruments A63 5/00; Sound recording and reproducing G11B; Associated working with recording or reproducing apparatus G11B 31/02 {G10F} {3}
201  DD  .~ Automatic musical instruments {G10F 1/00} {7}
203.~.~ Pianofortes which have no keyboard {G10F 1/04}