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Thomas Alva Edison (1847-1931) was an American inventor. In 1879, he produced the forst
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Thomas Alva Edison (1847-1931) was an American inv...

Thomas Alva Edison.
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Thomas Alva Edison.

This is the printed patent drawing for the incandescent light bulb invented by Thomas A. Edison. 1880.
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This is the printed patent drawing for the incande...