Title Page | Collection Summary | Biographical/Organizational Note | Scope and Content | Arrangement
Biographical Note
| Date | Event |
|---|---|
| 1873, Aug. 26 | Born, Council Bluffs, Iowa |
| 1896 | Ph.B., Yale University, New Haven, Conn. |
| 1899 | Ph.D., Yale University, New Haven, Conn. |
| 1900 | Joined Western Electric Co., Chicago, Ill. Designed alternating current transmitter Developed electrolytic receiver |
| 1901 | Founded American De Forest Wireless Telegraph Co. (later United Wireless Telegraph Co.) |
| 1905 | Developed first model of audion amplifier |
| 1906 | Developed triode vacuum tube Married Lucille Sheardown (divorced 1907) |
| 1908 | Married Nora Blatch (divorced 1911) |
| 1910 | Broadcast voice of Enrico Caruso by radio from the Metropolitan Opera House, New York, N.Y. |
| 1912 | Sold telephone repeater rights to American Telephone and Telegraph Co., which used his three electrode vacuum tube in first transcontinental telephony Married Mary Mayo (divorced 1930) |
| 1913 | Demonstrated first oscillating audion tube Became vice president, Radio Telegraph Co. Became vice president, De Forest Radio Co. |
| 1916 | Made first radio news broadcast Established radio broadcast station |
| 1919 | Patented phonofilm device for making talking pictures |
| circa 1920 | Published How to Set Up an Amateur Radio Receiving Station (New York, N.Y.: De Forest Radio Telephone and Telegraph Co. 32 pp.) |
| circa 1922 | Published Wireless in the Home (New York, N.Y.: De Forest Radio Telephone and Telegraph Co. 32 pp.) |
| 1923 | Demonstrated sound on film at Rivoli Theater, New York, N.Y. Organized De Forest Phonofilm Co. |
| 1926 | D.Sc., Yale University, New Haven, Conn. |
| 1930 | Married Marie Mosquini |
| 1934 | Established Lee De Forest, Inc., Los Angeles, Calif. |
| 1942 | Published Television, Today and Tomorrow (New York, N.Y.: Dial Press. 361 pp.) |
| 1947 | Edison Medal of the American Institute of Electrical Engineers |
| 1950 | Published Father of Radio (Chicago, Ill.: Wilcox and Fallett. 502 pp.) |
| 1951 | Vice president, National Association for Better Radio and Television |
| 1961, June 30 | Died, Hollywood, Calif. |