Incandescent light bulb - William D. Coolidge developed a method of making "ductile Tungsten" from Sintered Tungsten

Time: 1906

Place: Massachusetts, U.S.

Details: 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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