The Lombard Steam Log Hauler, patented 21 May 1901, was the first successful commercial application of a continuous track for vehicle propulsion.[1][2][3] The concept was later used for military tanks during World War I and for agricultural tractors and construction equipment following the war.
- ^ Alvin O. Lombard, Logging Engine, U.S. patent 674,737, granted May 21, 1901.
- ^ Alvin O. Lombard, Log Hauler, U.S. patent 854,364, granted May 21, 1907.
- ^ Auman (1984) p.99