US Patent No. 608,729, granted August 9, 1898 to Magnus Swenson of Chicago, assignor to the American Cotton Company, for a multiple cotton gin. The design uses several gangs of saws in one horizontal plane, grooved rollers between the gangs, a slatted feed belt that carries off seeds and foreign matter, a spiked roller that keeps cotton off the belt, and interlinked brushes for moting. The document has four sheets of patent drawings (Figs. 1-4) followed by the specification, which describes the belt-and-pulley drive and ends with 16 claims.