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Inventions (2) Aeronautics and state (1) Airplanes (1) Atomic clocks (1) Clocks and watches (1) Cold War (1) Engineers (1) Frequency standards (1) Inventors (1) Military-industrial complex (1) Patents (1) Railroads (1) Traffic engineering (1) Traffic signs and signals (1) United States (1) War (1) World War, 1914-1918 (1) World War, 1939-1945 (1)

Adler, Charles, Jr., 1899-1980 (engineer, inventor) (1) Bagnall, James (1) Bovarnick, Michael (1) Daly, Richard Timothy, Jr. (1) George, James (1) Grant, Eugene (1) Holloway, Joseph (1) Lerner, Louis C. (1) Mainberger, Walter (1) NATCO, Inc. (National Company, Inc.) (1) National Air and Space Museum. Archives Division. (1) Orensberg, Arthur (1) Princeton University (1)

Baltimore (Md.) (1)

Archives Center, National Museum of American History (3) National Air and Space Museum Archives (1)