2004-10-30/2019-10-29 - 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 Robert Rankin, Deep River, Connecticut, 1907; associated with Pratt, Read & Co. Patent #866,066; September 17, 1907; balanced key. Source: Information taken from the text of the United States patent listed above.
2015-10-12/2020-04-09 - See main entry: Read & Co. Pratt
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