PENNSYLVANIA: Ferris wheels
Though "Pleasure wheels" date back as far as 17th-century Bulgaria, George Ferris from Pittsburgh invented what we have come to know as the Ferris wheel in 1892. It debuted at the 1893 World's Columbian Exposition in Chicago.
William Somers, who had patented a similar ride called a "roundabout," sued Ferris for copyright infringement, but the case was dismissed.