8/16/2019 U.S. Patent 4,308,784, entitled "Ceramic parts for stringed musical instruments" to Eizonas, issued Jan 5, 1982.

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8/16/2019 U.S. Patent 4,308,784, entitled "Ceramic parts for stringed musical instruments" to Eizonas, issued Jan 5, 1982.

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8/16/2019 U.S. Patent 4,308,784, entitled "Ceramic parts for stringed musical instruments" to Eizonas, issued Jan 5, 1982.

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8/16/2019 U.S. Patent 4,308,784, entitled "Ceramic parts for stringed musical instruments" to Eizonas, issued Jan 5, 1982.

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