American slide rule manufacturer based at 4212 W. 24th Place, Chicago, Illinois. Died September 21, 1940. He was active a slide rule manufacturer between c.1911 - c.1919 before selling his business to the Gilson Slide Rule Company.
American slide rule manufacturer based at 4212 W. 24th Place, Chicago, Illinois. Died September 21, 1940. He was active a slide rule manufacturer between c.1911 - c.1919 before selling his business to the Gilson Slide Rule Company.