Site information:

E corner of Channing Ave and Emerson St, Palo Alto

Nothing remains of this site, as far as I know.

37.441534,-122.157674

Plaque information:

State plaque

Plaque text:

Electronics Research Laboratory

Original site of the laboratory and factory of Federal Telegraph Company, founded in 1909 by Cyril F. Elwell. Here, with two assistants, Dr. Lee de Forest, inventor of the three-element radio vacuum tube, devised in 1911-13 the first vacuum tube amplifier and oscillator. World-wide developments based on this research led to modern radio communication, television, and the electronics age.

Plaque placed by the State Department of Parks and Recreation in cooperation with the City of Palo Alto and the Palo Alto Historical Association.  May 2, 1978

Registered 11/3/1969