2004-10-30/2019-04-29 - From the OHS PC Database, derived from A Guide to North American Organbuilders, rev. ed., by David H. Fox (Organ Historical Society, 1997). — Patent awarded to Thomas V. Challinor, Chatham, Connecticut, 1905. Patent #797,719; 22 Aug. 1905; tremolo. Sources: Information taken from the text of a United States patent.
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