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About: William D. Coolidge     Goto   Sponge   NotDistinct   Permalink

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William David Coolidge (/ˈkuːlɪdʒ/; October 23, 1873 – February 3, 1975) was an American physicist and engineer, who made major contributions to X-ray machines. He was the director of the General Electric Research Laboratory and a vice-president of the corporation. He was also famous for the development of "ductile tungsten", which is important for the incandescent light bulb.