Noun
United States electrical engineer who in 1907 patented the first triode vacuum tube, which made it possible to detect and amplify radio waves (1873-1961)
Source: WordNetDisney used Pat Powers' Cinephone system, created by Powers using Lee De Forest 's Phonofilm system. Source: Internet
In 1906, Lee De Forest brought out a vacuum tube device which he called the " audion ". Source: Internet
John Ambrose Fleming (1906) In 1906, Lee De Forest of the US added a control "grid" to the valve to create a vacuum tube RF detector called the Audion, leading Fleming to accuse him of copying his ideas. Source: Internet