. . "1849Z"^^ . . "1849-11-29Z"^^ . . . "Sir John Ambrose Fleming"@en . "1945Z"^^ . . . . . . . . "Sir John Ambrose Fleming FRS (29 November 1849 \u2013 18 April 1945) was a British electrical engineer and physicist. He is known for inventing the first thermionic valve or vacuum tube. He is also famous for the left hand rule (for electric motors)."@en . "Fleming, John Ambrose"@en . "1945-04-18Z"^^ . "John Ambrose Fleming"@en . "Electrical engineerandphysicist" . . . . .