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3696201
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Patent number 3,696,201
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Issue date Oct 3, 1972
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3651242
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Patent number 3,651,242
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Issue date Mar 21, 1972
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3651337
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Patent number 3,651,337
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Issue date Mar 21, 1972
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3651336
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Patent number 3,651,336
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Issue date Mar 21, 1972
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3628054
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Patent number 3,628,054
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Issue date Dec 14, 1971
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3603809
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Patent number 3,603,809
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Issue date Sep 7, 1971
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3602824
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Patent number 3,602,824
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Issue date Aug 31, 1971
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3535429
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Patent number 3,535,429
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Issue date Oct 20, 1970
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3534144
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Patent number 3,534,144
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Issue date Oct 13, 1970
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3469109
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Patent number 3,469,109
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Issue date Sep 23, 1969
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3443463
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Patent number 3,443,463
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Issue date May 13, 1969
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3443017
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Patent number 3,443,017
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Issue date May 6, 1969
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3387527
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Patent number 3,387,527
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Issue date Jun 11, 1968
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3379820
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Patent number 3,379,820
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Issue date Apr 23, 1968
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3223768
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Patent number 3,223,768
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Issue date Dec 14, 1965
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3143712
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Patent number 3,143,712
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Issue date Aug 4, 1964
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3009116
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Patent number 3,009,116
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Issue date Nov 14, 1961
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2983877
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Patent number 2,983,877
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Issue date May 9, 1961
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2973484
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Patent number 2,973,484
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Issue date Feb 28, 1961
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2783381
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Patent number 2,783,381
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Issue date Feb 26, 1957
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2740892
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Patent number 2,740,892
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Issue date Apr 3, 1956
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2682616
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Patent number 2,682,616
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Issue date Jun 29, 1954
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2680198
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Patent number 2,680,198
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Issue date Jun 1, 1954
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G10 - MUSICAL INSTRUMENTS ACOUSTICS