In October 1879, Edison "perfected" the light bulb | Signify Company Website
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Thomas Edison invented first lightbulb and its filament, vintage line drawing or engraving illustration Stock Vector Image & Art - Alamy
Thomas Edison Did Not Invent The Light Bulb
Thomas Edison House celebrates the inventor's 140-year-old accomplishment | Morning | wdrb.com
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Electric Lamp: The Thomas A. Edison Papers at Rutgers University
