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How many years did it take for thomas edison to invent the light bulb?

How many years did it take for thomas edison to invent the light bulb?
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How many years did it take for thomas edison to invent the light bulb?

User Andrey Banshchikov
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Thomas Edison's teachers said he was "too stupid to learn anything." He was fired from his first two jobs for being "non-productive." As an inventor, Edison made 1,000 unsuccessful attempts at inventing the light bulb.
User Rei Mavronicolas
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