2004-10-30/2019-04-29 - From the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox, rev. ed. (Richmond, Va.: Organ Historical Society, 1997). - London, England, 1897. Patent #584,624; June 15, 1897; organ. Reading the description in the patent, it appears the invention was some form of melody coupler for sounding additional pipes for either the top or bottom note played on the same keyboard. -Ed. Source: Information taken from the text of a United States patent.
2018-12-18/2025-04-11 - From Organ Database Builders editor Stephen Hall, May 30, 2018. - (Born in Liverpool, England, October 19, 1842; died in London, England, September 21, 1910). Thomas Casson retired early from a career in banking in 1887 and first worked as an organ builder in partnership with J.R. Miller in Perth, Scotland. In 1888, he established the Casson Patent Organ Co. Ltd. in Denbigh, Wales and London, England. This became the Positive Organ Company in 1891, specializing in small instruments "For Country and Mission Churches." Source: Christopher Kent, "Casson, Thomas (1842-1910) Organ Builder" (Grove Music Online, 2001) | e-ISBN: 9781561592630.
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