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US917825A
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Duplex tracker-bar for pneumatic musical instruments.
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US929264A
|
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Automatic speed-regulator for pneumatic motors.
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US929740A
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Expression device for pneumatic piano-playing mechanisms.
|
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US895220A
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Pneumatic valve-action for player-pianos.
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US806609A
|
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Automatic governor for pneumatic motors.
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US797390A
|
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Pedal for self-playing pianos.
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US790164A
|
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Motor mechanism for unwinding and rewinding perforated music-sheets.
|
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US797389A
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Self-playing piano.
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GB190212756A
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A New or Improved Pneumatic Self-playing Attachment for Pianos.
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US711190A
|
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Treadle for organs or the like.
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US883600A
|
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Pneumatic valve-action.
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