Science & Tech
3
The original site of the laboratory and factory of Federal Telegraph Company, founded in 1909 by Cyril F. Elwell, was where Dr. Lee de Forest, inventor of the three-element radio vacuum tube, worked with two assistants in 1911-13 to devise the first vacuum tube amplifier and oscillator. World-wide developments based on this research led to modern radio communication, television, and the electronics age.
Hear stories like this as you drive
ExploreHere reads historical markers out loud as you pass them: over 325,000 stories across the US. No account needed.
4.7 · 800+ ratings · Free
FIND IT
Stanford, California · United States
