2004-10-30/2019-04-29 - From the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox (Organ Historical Society, 1991). - Patent awarded to Ferdinand Weinbrenner, Nuekirchen, Prussia, Germany. Patent #393,871; December 4, 1888; stop action. Source: Information taken from the text of a United States patent.
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