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) - Chicago, Illinois; associated with Kellogg Switchboard & Supply Co. of Chicago, Illinois. Patent #1,311,865; 5 August 1919; combination action. Sources: Information taken from the text of a United States patent.
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