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G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
G10C5/00—Combinations with other musical instruments, e.g. with bells or xylophones
G10C5/10—Switching musical instruments to a keyboard, e.g. switching a piano mechanism or an electrophonic instrument to a keyboard; Switching musical instruments to a silent mode
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FR548104D1921-03-021922-03-02
Device for optionally producing the effect of cymbals in ordinary hammer pianos
ExpiredFR548104A
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