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Famous Inventions Part-9

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Q.1 : Who invented fuel cells in 1839?
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Q.2 : Who invented the phonograph?
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Q.3 : Who is the only U.S. President to invent and patent something?
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Q.4 : What George Westinghouse invented?
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Q.5 : Who among the following invented the smallpox vaccine?
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Q.6 : What Enrico Fermi invented?
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Q.7 : Who invented Bifocal Lens?
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Q.8 : Who invented detonator?
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Q.9 : Who invented Dishwasher?
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Q.10 : Who invented windshield wiper blades?
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