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He had used his experience with electricity to create one of the first electric batteries.
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he had invented the telephone.
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he had invented the phonograph, an electric generation plant, and the lightbulb.
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he built an international combustion engine that could be fueled by energy.
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he had introduced the idea of interchangeable parts, which were identical components that could replace one another in manufacturing.
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he developed a way to send electrical signals without wire or cable. This was called the radio in America
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he had invented the first successful airplane with his brother.
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he had invented assembly lines which led to mass production.