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American and international furniture manufacturer. In 1938 Hans Knoll, (d.1958) a German emigré, established HG Knoll in New York. Wife Florence Schust Knoll assumed directorship of the firm in 1955. The company was later sold to Art Metal, Inc., and in 1965 Robert Cadwallader became president. Massimo Vignelli was head of graphic design and advertising, appointed 1965.