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Last edited by Erraticonteuse
October 12, 2025 | History
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John Hays Hammond, Jr.

Photo of John Hays Hammond, Jr.

American inventor (1888–1965)

Born 1888
Died 1965

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Photo of John Hays Hammond, Jr.

American inventor (1888–1965)

Born 1888
Died 1965

Subjects

American Science fiction Correspondence Electron tubes Glassware Inertial navigation systems Patents Private collections Radio Radio frequency modulation Research

Places

Gloucester Gloucester (MA) Massachusetts United States

People

Alexander Graham Bell (1847-1922) Elmer Ambrose Sperry (1860-1930) Ernst Fredrik Werner Alexanderson (1878-1975) Irving Langmuir (1881-1957) John Hays Hammond Jr. (1888-1965) Lee De Forest (1873-1961) Nikola Tesla (1856-1943)

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