1879 – Walking Steam Tractor – Praul (American)
j IMPROVEMENT IN TRACTION-ENGINES JOHN E. PRAUL Patent number: 221354 Filing date: Sep 26, 1879 Issue date: Nov 4, 1879. See patent here.
a history of cybernetic animals and early robots
j IMPROVEMENT IN TRACTION-ENGINES JOHN E. PRAUL Patent number: 221354 Filing date: Sep 26, 1879 Issue date: Nov 4, 1879. See patent here.