From the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox (Richmond, Va.: Organ Historical Society, 1991). —

Jacob C. Hallman. Active in Waterloo and Kitchner, Ontario, Canada, 1950-1969; reed and pipe organs.

Patent #2,577,580; December 4, 1951; reed organ valve

Sources:

• Robert F. Gellerman, Gellerman’s International Reed Organ Atlas (Vestal, NY: The Vestal Press, 1985), 54.
• Kallmann et al., Encyclopedia of Music in Canada (Toronto: University of Toronto Press, 1981), 712.