Category:Tremoloa

**tremoloa**
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Subclass of	true board zithers with resonator box;
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	Q7838128;
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Harold G. Finney, John H. Large (International Musical Corp., Hoboken), U.S. Patent 1,847,303 Stringed Musical Instruments (filed in 1929-04-30, issued in 1932-05-01)
Kelly Williams (Jan. 02). Tremoloa. The Guitar-Zither Clearinghouse.