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Cymbal
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Patent number 9,990,909
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Issue date Jun 5, 2018
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RTOM Corporation
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Gabriel Azaceta
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Drumhead assembly
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Patent number 7,781,661
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Issue date Aug 24, 2010
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RTOM Corporation
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Thomas P. Rogers
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Practice drumhead assembly
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Patent number 7,514,617
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Issue date Apr 7, 2009
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RTOM Corporation
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Thomas P. Rogers
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Inflatable musical drum
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Patent number 6,069,307
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Issue date May 30, 2000
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RTOM Corporation
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Thomas P. Rogers
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Percussion instrument damping
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Patent number 5,637,819
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Issue date Jun 10, 1997
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RTOM Corporation
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Thomas P. Rogers
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Gel drumhead transducing
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Patent number 5,585,581
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Issue date Dec 17, 1996
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RTOM Corporation
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Thomas P. Rogers
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Electroacoustical drum
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Patent number 5,430,245
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Issue date Jul 4, 1995
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RTOM Corporation
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Thomas P. Rogers
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G10 - MUSICAL INSTRUMENTS ACOUSTICS