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What year was Spinning Mule invented and how?
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Who invented the Spinning Mule?
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What year was Vaccination invented and how?
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Which company is ahead in Autogiro innovations?
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Which company is ahead in Tank (military) innovations?
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When and who invented the Night Club?
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When and who invented the Skyscraper?
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What year was Automobile (steam) invented and how?
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Who invented the Cash Register?
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What year was Rubber (vulcanised) invented and how?
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When and who invented the Iron Working?
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Who invented the Fountain Pen?
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What year was Streetcar (electric) invented and how?
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What year was Telegraph invented and how?
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Who invented the Photography (on paper)?
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Who invented the Stethoscope?
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Which company is ahead in Vaccination innovations?
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