US Patent No. 938,224, granted 26 October 1909 to Willard D. Doremus of Washington, D.C. (assignor to the National Cotton Improvement Company), for a cotton gin. It describes a horizontal series of overlapping saw cylinders, all turning the same way at increasing speeds, that comb seed from the fiber without shortening it. The patent also covers brushes that clear the saws, fiber conduits with mote boards, hinged cylinder covers, a seed-return system, and a sectional frame. It has seven sheets of drawings (Figs. 1-11), a specification, and 48 claims.