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pawan purohit
@pawanpurohit12 · 9 years, 4 months ago
@pawanpurohit12 · 9 years, 4 months ago
People+believe+Thomas+Edison+invented+the+light+bulb.%3Cbr+%2F%3E%0D%0ABut%2Cin+reality+Joseph+Swan+did.Edison+just+improved+on+the+design+Swan+had+patented.
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