2004-10-30/2019-10-13 - 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 John A. Hultman, Omaha, Nebraska, 1892. Patent #470,868; March 15, 1892; organ. Source: Information taken from the text of a United States patent.
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