Title: John Hays Hammond papers
Subjects: Correspondence, Inertial navigation systems, Radio, Electron tubes, Radio frequency modulation, Patents, Research
People: Ernst Fredrik Werner Alexanderson (1878-1975), Alexander Graham Bell (1847-1922), Lee De Forest (1873-1961), Elmer Ambrose Sperry (1860-1930), Nikola Tesla (1856-1943), Irving Langmuir (1881-1957)