Elmer Tiling Cunningham an American entrepreneur was in direct violation by infringing on patents of a British electrical engineer known for inventing the first what?
John Ambrose Fleming: Sir John Ambrose Fleming FRS (29 November 1849 – 18 April 1945) was a British electrical engineer and physicist. John Ambrose Fleming:  He is known for inventing the first thermionic valve or vacuum tube.
i don't know