Power operated guitar device

Reciprocating ornamental display assembly

Reinforced music box

Relay valve assembly for player pianos

Released key velocity estimator, method used therein and informa

Remote control system for a musical instrument or instruments

Remote-controlled key-depressing device

Rotating fabric-covered box

Rotation-driven structure for music box

Self playing piano and an apparatus for automatic playing of a p

Separate automatic player driving keys and pedals of...

Separate automatic player driving keys and pedals of...

Slide rule for music

Solenoid actuator for use in automatic performance piano

Solenoid dashpot pedal actuator assemblies

Solenoid drive system for an automatic performing apparatus

Solenoid driving apparatus for actuating key of player piano

Solenoid mounting assembly for musical keyboard

Solenoid mounting plate for musical keyboard

Solenoid mounting systems for player and reproducing pianos