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Armstrong, Edwin H. (Edwin Howard), 1890-1954.
Edwin H. Armstrong papers, 1890-1972.
Professional and personal files including Armstrong's correspondence with professional associations, other engineers, and friends, his research notes, circuit diagrams, lectures, articles, legal papers, and other related materials. Of his many inventions and developments, the most important are: 1) the regenerative or feedback circuit, 1912, the first amplified radio reception, 2) the superheterodyne circuit, 1918, the basis of modern radio and radar, 3) superregeneration, 1922, a very simple, high-power receiver now used in emergency mobile service, and 4) frequency modulation - FM, 1933, static-free radio reception of high fidelity. More than half the files concern his many lawsuits, primarily with Radio Corporation of America, over infringement of the Armstrong patents. Litigation continued until 1967. Other files deal with his work in the Marcellus Hartley Research Laboratory at Columbia University, 1913-1935, and with the American Expeditionary Forces in France during World War I, his Air Force contracts for communications development, Army research during World War II, the Radio Club of America, the Institute of Radio Engineers, FM development at his radio station at Alpine, N.J., the use of FM in television, his involvement in Federal Communications Commission hearings and legislation, and his work with the Zenith Radio Corporation. Also, letters to H.J. Round.
1990 ADDITION: Files from the firm of Cravath, Swaine, & Moore. Files, dating from the late 1920s to the 1960s, pertaining to Professor Armstrong's litigation with Lee de Forest over the regeneration patents; his suit against RCA and other infringers of his FM patents; the original letters patent, among which are those for his FM system; and financial matters relating to the Armstrong laboratories, the FM station in Alpine, New Jersey, other real estate properties, and his estate.
Inventor, Professor of Electrical Engineering at Columbia University, 1934-1954.
Burger, Warren E., 1907-
Bush, Vannevar, 1890-1974.
Butler, Nicholas Murray, 1862-1947.
Coudert, Frederic R. (Frederic Ren)̌, 1871-
De Forest, Lee, 1873-1961.
De Voto, Bernard Augustine, 1897-1955.
Dewey, Thomas E. (Thomas Edward), 1902-1971.
Donovan, William J. (William Joseph), 1883-1959.
Eisenhower, Dwight D. (Dwight David), 1890-1969.
Farley, James Aloysius, 1888-
Fermi, Enrico, 1901-1954.
Hoover, Herbert, 1874-1964.
Kaempffert, Waldemar, 1877-1956.
La Guardia, Fiorello H. (Fiorello Henry), 1882-1947.
Lodge, Henry Cabot, 1902-
McCormick, Robert Rutherford, 1880-1955.
Marconi, Guglielmo, 1874-1937.
Murray, Thomas E. (Thomas Edward), 1860-1929.
Paley, William S. (William Samuel), 1901-
Pupin, Mixhael Idvorsky, 1858-1935.
Round, Henry J.
Sarnoff, David, 1891-1971.
Stimson, Henry Lewis, 1867-1950.
Stokowski, Leopold, 1882-1977.
Sulzberger, Arthur Hays, 1891-1968.
Woodbridge, Frederick James Eugene, 1867-1940.
Young, Owen D., 1874-
United States. Federal Communications Commission.
United States. Army. American Expeditionary Forces.
United States. Air Force
Radio Corporation of America.
Columbia University. Marcellus Hartley Research Laboratory.
Zenith Radio Corporation.
Radio Club of America.
Institute of Radio Engineers.
Cravath, Swaine & Moore.
World War, 1914-1918 -- France.
World War, 1939-1945.
Patent lawyers.
Patent suits.
Patents
Radar.
Radio stations -- New Jersey -- Alpine.
Superheterodyne receivers -- Research.
Radio -- Law and legislation.
Radio -- Patents.
Radio -- Receivers and reception -- Research.
Radio frequency modulation -- Research.
Radio -- Transmitters and transmission -- Research.
Alpine (N.J.)
Sound recordings lcgft
Notebooks. aat
Photographs. aat
Scrapbooks. aat
Transcripts. aat
Wills. ftamc
College teachers. lcsh
Inventors. lcsh
Electric engineers. lcsh
AIP-ICOS
Columbia University. Rare Book and Manuscript Library. Butler Library, 6th Floor East, New York, NY 10027, USA.
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