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US1201306A
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Pneumatic action for musical instruments.
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Pneumatic adjusting mechanism for musical instruments.
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Automatic regulator for pneumatic pianos.
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Automatic playing mechanism for grand pianos.
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Control mechanism for self-playing musical instruments.
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US1103213A
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Expression device for pneumatically-operated musical instruments.
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Pneumatic action for automatically-operated musical instruments.
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Transposing-tracker for mechanical music-players.
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US897656A
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Self-playing musical instrument.
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US883252A
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Detachable automatic action for pianos.
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US891951A
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Pneumatic-action for automatic pianos.
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US897288A
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Expression attachment.
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US894546A
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Pneumatic-action for musical instruments.
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