Pioneer Electronics Research Laboratory

Santa Clara County · SE corner of Channing Ave. and Emerson St., Palo Alto · location approximate

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. Worldwide developments based on this research led to modern radio communication, television, and the electronics age.

1971 register text, presented as a historical document. It uses the period's terms for Native people; the state's landmark listings still carry most of this wording, and the California Office of Historic Preservation maintains the program's current texts.

Many of these plaques have since been recast or their texts revised. The California Historical Landmarks program and its current texts are maintained by the California Office of Historic Preservation. California Office of Historic Preservation ↗

Stanford Libraries

Marker data: State of California, Department of Parks and Recreation, California Historical Landmarks (1971)

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