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  • New Jersey, U.S.
    Monday Oct 14, 1878

    Incandescent light bulb

    Edison filed his first patent Application for "Improvement In Electric Lights"

    New Jersey, U.S.
    Monday Oct 14, 1878

    Thomas Edison began serious research into developing a practical incandescent lamp in 1878. Edison filed his first patent application for "Improvement In Electric Lights" on 14 October 1878.




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