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Armstrong, Edwin Howard (18 December 1890–31 January 1954), electrical engineer and inventor, was born in New York City, the son of John Armstrong, a publisher, and Emily Smith, a teacher. Armstrong attended public schools in New York City and in Yonkers, New York, where the family moved in 1900. Fascinated by machinery, he enjoyed repairing broken toys for friends and later learned to repair automobiles. In his teens he was impressed by ...

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de Forest, Lee (26 August 1873–30 June 1961), radio engineer and inventor, was born in Council Bluffs, Iowa, the son of Henry Swift de Forest, a Congregational minister, and Anna Margaret Robbins. He grew up in Iowa and (after 1879) Talladega, Alabama, where his father was president of the Talladega College for Negroes....

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Fessenden, Reginald Aubrey (06 October 1866–22 July 1932), inventor, was born in East Bolton, Quebec, Canada, the son of Elisha Joseph Fessenden, an Anglican clergyman, and Clementina Trenholme. Fessenden spent his earliest years at Bolton Centre, Quebec, and Fergus, Ontario. From a young age he showed a keen interest in invention and science and filled every free moment with the reading of scientific texts, being encouraged in this pursuit by his uncle, Cortez Fessenden, a teacher of science and mathematics. At the age of seven Fessenden read Gibbon’s ...

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Goldmark, Peter Carl (02 December 1906–07 December 1977), inventor, was born in Budapest, Hungary, the son of Alexander Goldmark, a hatmaker, and Emmy (maiden name unknown). In 1919 Goldmark’s family fled to Vienna, Austria, to escape the Communist revolution in Hungary. Goldmark studied for a year at the Berlin Technische Hochschule in Charlottenburg, Germany, and then transferred to the Physical Institute of Vienna, where he received his B.Sc. in 1930 and his Ph.D. in physics in 1931....