2004-10-30/2020-04-09 - From the OHS PC Database, derived from A Guide to North American Organbuilders, rev. ed., by David H. Fox (Organ Historical Society, 1997). — Schwamendingen, Switzerland, 1928. Patent #1,681,547; 21 Aug. 1928; organ action. Source: Information taken from the text of a United States patent.
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