2004-10-30/2019-04-29 - 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 Frederick B. Little, Chicago, Illinois 1917-1919. Patent #1,228,222; 29 May 1917; electric key action. Patent #1,291,568; 14 Jan. 1919; coupler. Source: Information taken from the text of United States patents.
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