The Electric Light System - Thomas Edison National Historical Park (U.S. National Park Service)
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November 4, 1879: Thomas Edison Invents the Electric Light, Files Patent - Constituting America
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Thomas Edison Patents: The Lightbulb & Beyond
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The History of the Light Bulb | Department of Energy
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Who Invented the Lightbulb?
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Thomas Edison Invents Light Bulb and Myths About Himself | Time
Edison's light bulb turns 135 | National Museum of American History
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