US Patent 3,959,851, granted June 1, 1976 to Woodrow W. Bledsoe of Memphis, Tennessee, for a cotton ginning apparatus that removes seeds from seed cotton. It uses a ginning saw cylinder, a serrated kicker cylinder, and a spiral gin roller with left- and right-hand vanes. A brush doffs the lint, and an air-wash system cleans the fibers. The scan includes an online text version of the patent (abstract, claims, description) and the printed patent with two sheets of drawings (Figs. 1-4).