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-
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Pianoharp action
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Patent number 4,285,261
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Issue date Aug 25, 1981
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Ellis Barron
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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-
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Plectrum piano action
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Patent number 4,099,440
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Issue date Jul 11, 1978
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Ellis Barron
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3878753
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Patent number 3,878,753
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3785237
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Patent number 3,785,237
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Issue date Jan 15, 1974
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3777612
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Patent number 3,777,612
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Issue date Dec 11, 1973
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3678793
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Patent number 3,678,793
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Issue date Jul 25, 1972
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3677124
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Patent number 3,677,124
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Issue date Jul 18, 1972
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3577823
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Patent number 3,577,823
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Issue date May 4, 1971
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3525283
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Patent number 3,525,283
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Issue date Aug 25, 1970
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3512444
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Patent number 3,512,444
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3478630
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Patent number 3,478,630
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Issue date Nov 18, 1969
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3453922
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Patent number 3,453,922
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3426637
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Patent number 3,426,637
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Issue date Feb 11, 1969
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3397604
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Patent number 3,397,604
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3339442
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Patent number 3,339,442
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3293974
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3130624
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2808754
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2785595
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Patent number 2,785,595
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2185734
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2151133
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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1891848
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Patent number 1,891,848
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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1849974
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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1824706
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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1750572
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Patent number 1,750,572
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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1668406
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Patent number 1,668,406
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G10 - MUSICAL INSTRUMENTS ACOUSTICS