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| | Lee
De Forest |
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| | Council
Bluffs,
Iowa 26.August.1873-
Hollywood, California 30.June.1961 |
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| Brief
biographical history of Lee De Forest
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| 1873 | Born in August 26, Council Bluffs, Iowa father
Henry Swift DE FOREST mother Anna Margaret ROBBINS |
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| 1878 | Born his brother Charles Mills DE FOREST |
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| 1898 | The father dies Henry Swift DE FOREST |
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| 1896-1899 |
 He graduated with a thesis "The
Reflection of Hertzian Waves at the End of Parallel Wires"
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| 1900 |
Work at Western Electric
Co.. , Chicago, Ill. |
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| 1901 | Found The
American De Forest Wireless Telegraph Co..United Wireless Telegraph Co).
(Later |
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| 1905 | He developed the prototype of 'audion amplifier |
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| 1906 | Develop the Triode (vacuum tube) |
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| They married
on February 17 with Lucille Sheardown in New York (hence divorced in
1907) |
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| 1908 | They married Nora Blatch
(hence divorced in 1912)-which union born Harriet Blatch DE FOREST
(1909?) |
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| 1910 | It transmits the voice of Enrico Caruso radio by
Metropolitan Opera House, New York, NY |
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| 1912 | It marries Mary Mayo (which they divorced in 1930)
and have children:
Eleanor DE FOREST, Marilyn DE
FOREST  |
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| 1913 | Presents the prototype oscillator with audion tube
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| 1916 | Opens a radio station |
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| 1919 | Patented
phonofilm device for making talking pictures |
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| ca. 1920 | Public How to Set Up an Amateur Radio Receiving
Station (New York, NY: De
Forest Radio Telephone and
Telegraph Co. 32 pp.) |
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| ca. 1922 | Post "Wireless in the Home" (New York, NY: De
Forest Radio Telephone and Telegraph Co. 32 pp.) |
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| 1923 | Demonstration of the movie Rivoli Theater, New
York, NY De Forest Co Phonofilm. |
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| 1930 | It marries Marie
Mosquini
( Los Angeles, California, USA 3 December
1899 – Los Angeles, California, USA 21 February1983)
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| 1934 | Opens Lee De Forest, Inc.., Los Angeles, Calif. |
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| 1942 | Publish "Television, Today and Tomorrow" (New
York, NY: Dial Press. 361 pp.) |
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| 1947 | Receives recognition of Edison Medal of the
American Institute of Electrical Engineers |
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| 1950 | Publish "Father of Radio"
(Chicago, Ill..: Wilcox and Fallett. 502 pp.) |
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| 1951 | June 30 - Appointment as Vice
President of the National Association for Better Radio and Television
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| 1961 | He died in Hollywood,
Calif. |
