This chair, of simple wood construction using surplus military webbing, was designed by Jens Risom for Hans Knoll, before Risom entered the Army during World War II. It was the basis for Knoll's first line of products introduced in 1942, virtually the only modern furniture available during the war in the US, and was patented in 1945.
Source-http://idsa.org/category/seo-tags/furniture