1922 – Walking Tractor – S. T. Corbitt (American)
Source: Popular Mechanics, March 1922 Patent number: 1287643 – see full patent details here. Filing date: Dec 12, 1917 Issue date: Dec 17, 1918
a history of cybernetic animals and early robots
Source: Popular Mechanics, March 1922 Patent number: 1287643 – see full patent details here. Filing date: Dec 12, 1917 Issue date: Dec 17, 1918