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G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
G10C1/00—General design of pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards
G10C1/06—General design of pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards of harpsichords spinets or similar stringed musical instruments
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FR340477D1904-02-161904-02-16Perfectionnements aux instruments de musique à clavier
ExpiredFR340477A
(fr)