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William D. Coolidge

Born: 1873
Birthplace: Hudson, Mass.

Vacuum tube—Coolidge invented ductile tungsten, the filament material still used in incandescent lamps. He also invented the “Coolidge tube”, the model upon which all X-ray tubes for medical applications are patterned. (1975)

Died: 1974

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Lloyd H. Conover The National Inventors Hall of FameHarry Coover

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