The invention of the light bulb is usually attributed to Thomas Alva Edison presented the October 21, 1878 a practical and viable lamp, which she wore for 48 hours straight
The light bulb is one of the inventions used by men since its inception to date. According to a ranking of Life magazine is the second most useful inventions of the nineteenth century. The marketing of the bulb by the company of Thomas A. Edison has been plagued with patent disputes with competitors.
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