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Known for
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Inventing numerous useful devices, including a practical electric light bulb and the phonograph
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Milestones
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1869 Received his first patent, for a vote-recording machine
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1876 Set up a research laboratory in Menlo Park, New Jersey
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1877 Invented the phonograph
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1879 Invented the first practical incandescent electric light bulb
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1882 Provided electricity, generated by a central power station, to New York City
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1883 Discovered that incandescent materials emit electrons. This phenomenon is known as the Edison effect or thermionic emission.
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1887 Moved his research laboratory to larger quarters in West Orange, New Jersey
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1891 Finished the kinetoscope, a device designed by Edison and his employee, William Dickson, to produce brief motion pictures
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1910 Invented the Edison battery, which used an alkaline electrolyte
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1913 Produced the first talking motion pictures
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Did You Know
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As a young man Edison saved a stationmaster's son from being hit by a train, and out of gratitude the stationmaster taught him how to use the telegraph.
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Edison patented over 1,000 inventions.
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Edison worked for the Navy during World War I, improving submarines and flamethrowers.
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