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Incandescent light bulb

William D. Coolidge developed a method of making "ductile Tungsten" from Sintered Tungsten

1906
Massachusetts, U.S.

In 1906, William D. Coolidge developed a method of making "ductile tungsten" from sintered tungsten which could be made into filaments while working for General Electric Company. By 1911 General Electric began selling incandescent light bulbs with ductile tungsten wire.


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