Charles Newbold was an American blacksmith born in 1780 in Chesterfield Township, New Jersey. On June 26, 1797, Newbold received the first patent for a cast iron plow. However, he was unable to sell his plow because many farmers feared that the iron in it would poison the soil. On April 1, 1807, David Peacock was issued a patent for a three-piece iron plow (Newbold's plow was cast in one piece). Newbold then sued Peacock for patent infringement and won $1500.
- "The Cast Iron Plow". Retrieved February 19, 2009.
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