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Sound production device
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Patent number 4,658,427
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Issue date Apr 14, 1987
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Etat Francais represente per le Ministre des PTT (Centre National d'Etudes de...
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Sylvain Aubin
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3652776
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Patent number 3,652,776
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Issue date Mar 28, 1972
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3478792
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Patent number 3,478,792
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Issue date Nov 18, 1969
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2900861
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Patent number 2,900,861
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Issue date Aug 25, 1959
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2601265
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Patent number 2,601,265
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Issue date Jun 24, 1952
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2274370
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Patent number 2,274,370
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Issue date Feb 24, 1942
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2241027
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Patent number 2,241,027
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Issue date May 6, 1941
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2171936
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Patent number 2,171,936
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Issue date Sep 5, 1939
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2148166
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Patent number 2,148,166
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Issue date Feb 21, 1939
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G10 - MUSICAL INSTRUMENTS ACOUSTICS