Elmer T. Cunningham infringed on the vacuum tube patent of the British electrical engineer and physicist, born on what day?
Elmer T. Cunningham: Elmer Tiling Cunningham (September 1, 1889 – June 14, 1965) was an American entrepreneur and businessman, specializing in vacuum tubes and radio manufacturing. John Ambrose Fleming: Sir John Ambrose Fleming FRS (29 November 1849 – 18 April 1945) was a British electrical engineer and physicist.
i don't know