Tractors By slick_rick23 Sep 10, 1868 First Tractors Feb 14, 1892 Gas powered Aug 17, 1913 Open geared tractors Feb 15, 1918 Power Take Off (PTO) May 21, 1930 Rubber tires Oct 17, 1960 Diesel Feb 15, 1986 Roll-over protection structure Required by the US in 1986. Feb 15, 2011 Auto-Steer
