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US2021449A
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Action for grand pianos
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US2040304A
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Key and key frame for grand pianos
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US1403401A
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Combination balance-rall pin and key for pianos
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US1353646A
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Touch-regulator for grand-piano actions
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US1353644A
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Damper for upright-piano actions
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US1353648A
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Action-bracket for grand pianos
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US1353647A
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Action for grand pianos
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US1353643A
|
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Damper for grand-piano actions
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US1353645A
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Pianissimo device for upright-piano actions
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US1353649A
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Combination jack-spring and touch-regulator for upright-piano actions
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US1362414A
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Action for upright pianos
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