Event:
U.S. inventor Lee de Forest patents "Audion," a 3-diode amplification valve which proved a pioneering development in radio and broadcasting
More Notable Events on October 25:
1981 200,000 demonstrate in Brussel against cruise missiles
1971 Roy Disney dedicates Walt Disney World
1971 U.N. votes to expel Taiwan and admit Red China
1962 1st Belgian nuclear reactor begins operation
1955 Tappan sells 1st microwave oven
