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| navigate by keyword : 1847 1930s 1931 1940s also alva american americas autographic been bulb businessman carbon communication contributing credited described developed devices dictaphone edison electric encyclopaedia fields generation greatest greatly harmsworth has improved incandescent inventing inventions inventor kinetoscope lamp light many mass microphone motion nthomas particular phonograph pictures power printer recording sound such telephone thomas various was who |
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| The Harmsworth Encyclopaedia 1930s / 1940s -
Thomas Alva Edison was an American inventor and businessman who has been described as America`s greatest inventor. He developed many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures. Edison is credited for contributing to various inventions, including the phonograph, the kinetoscope, the dictaphone, the electric lamp in particular the incandescent light bulb, and the autographic printer. He also greatly improved the telephone by inventing the carbon microphone. |
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