List of days of the year

21 October - Thomas Edison applied for a patent for his design of an incandescent light bulb in 1879

 


On October 21, 1879, Thomas Edison applied for a patent for his design of an incandescent light bulb. Edison's patent, which was eventually granted on January 27, 1880, represented a crucial development in the field of electrical lighting. His design featured a filament inside a glass bulb that could glow when an electric current passed through it. This invention marked a major advancement in indoor and outdoor lighting and had a profound impact on daily life, eventually leading to the widespread adoption of electric lighting systems, displacing older methods of illumination like gas lamps and candles. Thomas Edison's contributions to the development of the incandescent light bulb significantly transformed the way people lived and worked by providing a reliable and efficient source of artificial light.

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