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William D. Coolidge Born: 1873Birthplace: 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: 1974Fact Monster/Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.
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