2004-10-30/2019-10-21 - From the OHS PC Database, derived from A Guide to North American Organbuilders, rev. ed., by David H. Fox (Organ Historical Society, 1997). - Patents awarded to Jerzy Polukanis, Bloomfield, New Jersey. Patent #499,036; June 6, 1893; organ. Patent #519,925; May 15, 1894; organ. Source: Information taken from the text of the United States patents listed above.
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