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asked 10 months ago
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Guest
answered 9 months ago
It wasn't invented by Thomas Edison of course. He simply improved it and marketed it.Many other inventors had produced such devices well before 1879 , the first incandescent bulb seems to date back to 1840 and it was patented by an English inventor in 1841 called Frederick de Moleyns.This was for a platinum filament in a vacuum tube.
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answered 8 months ago
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