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Elmer Ambrose Sperry

Born: 1860
Birthplace: Cortland, N.Y.

Gyroscopic compass—The gyroscope was the basis of Sperry's inventions of an autopilot and an airplane turn indicator that allowed flying without visual reference to the ground. His ideas are used today to stabilize space vehicles. (1991)

Died: 1930

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Samuel SmithThe National Inventors Hall of FameRangaswamy Srinivasan

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