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3719777
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Patent number 3,719,777
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Issue date Mar 6, 1973
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3251925
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Patent number 3,251,925
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Issue date May 17, 1966
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3250847
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Patent number 3,250,847
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Issue date May 10, 1966
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3167315
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Patent number 3,167,315
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Issue date Jan 26, 1965
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2930624
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Patent number 2,930,624
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Issue date Mar 29, 1960
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2924460
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Patent number 2,924,460
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Issue date Feb 9, 1960
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2910299
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Patent number 2,910,299
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Issue date Oct 27, 1959
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2585291
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Patent number 2,585,291
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Issue date Feb 12, 1952
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2562707
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Patent number 2,562,707
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Issue date Jul 31, 1951
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2273768
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Patent number 2,273,768
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Issue date Feb 17, 1942
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2224358
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Patent number 2,224,358
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Issue date Dec 10, 1940
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2201388
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Patent number 2,201,388
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Issue date May 21, 1940
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2201160
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Patent number 2,201,160
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Issue date May 21, 1940
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2199948
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Patent number 2,199,948
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Issue date May 7, 1940
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2190465
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Patent number 2,190,465
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Issue date Feb 13, 1940
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G10 - MUSICAL INSTRUMENTS ACOUSTICS