Grace's Guide To British Industrial History

Registered UK Charity (No. 115342)

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 162,258 pages of information and 244,500 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Difference between revisions of "Lee de Forest"

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'''Lee de Forest''' (c1874-30th June 1961)
'''Lee de Forest''' (26th August 1873 - 30th June 1961)


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Latest revision as of 18:41, 6 November 2016

Lee de Forest (26th August 1873 - 30th June 1961)


1961 Obituary [1]

We regret to record the death in Hollywood on June 30, at the age of eighty-seven, of Dr. Lee de Forest, pioneer of the radio valve. His invention of the "audio" three-electrode valve, or triode, came in 1906, and was made independently of similar work by Robert von Lieben in Vienna. De Forest was associated with early broadcasting activities in the United States, and between 1919 and 1926 was engaged on development of a system for talking pictures.

His business ventures included the De Forest Radio Telephone and Telegraph Company, and the De Forest Phonofilm Corporation. He held some 300 patents in the United States and other countries, and was a founder, Fellow and past president of the Institute of Radio Engineers.


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