US8324489B1
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“Railboard” fingerboard with integrated frets for stringed musical instruments
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US7629521B1
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Versatile neck truss system for stringed musical instruments
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US5285710A
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Adjustable bridge for a stringed musical instrument
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US5140887A
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Stringless fingerboard synthesizer controller
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US5079536A
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Pressure transducer for musical instrument control
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US4953435A
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Rear-access trussed neck construction for stringed musical instruments
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US4922797A
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Layered voice musical self-accompaniment system
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US4633754A
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Fret rod for stringed musical instruments
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US4649785A
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Musical timbre modification method
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US4142436A
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Method of playing stringed musical instrument
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CA1002353A
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Guitar-like instrument with magnetic pickup
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US3868880A
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Musical instrument construction
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