Ohio Home of the Lead Belt
1844 -- Cincinnati: US Patent 3,475, Machinery for the manufacture of lead pipes, March 9, 1844, Charles Sellers and George Escol Sellers
1910 -- Cleveland: Sherwin Williams offers Lead Paint for sale despite knowing the dangers.
1921 -- Dayton: Charles F. Kettering and Thomas Midgley added Tetraethyl Lead to gasoline. Cleveland based Standard Oil manufactured Ethyl Gasoline.
1970 -- Cleveland: United States Patent O 3,671,224 METHODS OF PRODUCING LEADED STEEL Donald F. North, Jr., Bay Village, and Jerry D. Thomas, Bedford Heights, Ohio, and Gerald W. Worth, St. Louis, Mo., assignors to Republic Steel Corporation. Leaded Steel is used in making machine parts. see Lead in the Air.