During the 19th century American inventors sought patents on self-propelled road machines. This steam-driven mechanical contraption was conceived by Zadoc Dederick and Isaac Grass from Newark, New Jersey, who said, "the pivots, cranks and connecting rods

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During the 19th century American inventors sought patents on self-propelled road machines. This steam-driven mechanical contraption was conceived by Zadoc Dederick and Isaac Grass from Newark, New Jersey, who said, "the pivots, cranks and connecting rods will produce an alternately-stepping motion". They were awarded a patent in 1868.

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Photo credit: © Photo Researchers / Alamy / Afripics
License: Licensed
Model Released: No

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