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Thomas Edison Incandescent Light Bulb | On this day in 1878, Thomas Edison began development on the first practical incandescent light bulb. #InnovationInHistory | By Stanford Research Park | Facebook
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In October 1879, Edison "perfected" the light bulb | Signify Company Website
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Edison works on his lightbulb, Thomas Edison. 1880-1886 | Christie's
Thomas Edison Talking About the Invention of the Light Bulb (Late 1920s) - YouTube
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Did Thomas Edison Really Invent the Lightbulb? | Britannica
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Great Influencers in Energy: Thomas Edison may not have invented the light bulb; but where would it (or we) be without him. - Opinion Dynamics
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