Papers, mainly 1916-1956, of Frederick Straubel, an inventor, business executive, and amateur photographer from Green Bay, Wisconsin, chiefly regarding the sale of the Automatic File and Index Company, the office equipment firm which he established in 1901; the patenting and licensing of several of the many patents which he held on filing devices; and the legally complex disposition of his estate by his son. Included are correspondence, which is available only on microfilm, and unfilmed financial records pertaining to the Automatic File and Index Company and the Straubel estate, patent sketches and information, several Automatic Index Company catalogues (also on film) and loose advertising materials, and information pertaining to an interest in the Weise-Hollman Co. of Green Bay. Few papers pertain directly to the Automatic File and Index Company except for correspondence, 1914-1921, between the Straubel firm and its Chicago retailer; annual operating statements, 1921-1935, and other miscellaneous financial records; and advertising material. Straubel's work as an accomplished financial records; and advertising material. Straubel's work as an accomplished amateur photographer is documented by Green Bay area views and original negatives.