When was the phonograph invented?

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According to The Library of Congress, the phonograph, a device for recording and playing back sound, was invented by Thomas Edison in 1877. Edison is often credited with the development of the first practical and commercially successful phonograph.
Hulton Archive/Getty Images
Hulton Archive/Getty Images
When was the phonograph invented?
- 1910
- 1900
- 1880
- 1870
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