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What year was Argon invented and how?
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When and who invented the Electric Fan?
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When and who invented the Time Recorder?
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Who invented the Nineteenth Laws of Planetary Motion?
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What year was Stirrups (metal) invented and how?
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What year was Watch (self-winding) invented and how?
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What year was Streetcar (electric) invented and how?
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Which company is ahead in Locomotive innovations?
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Who invented the Refrigerator?
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Which company is ahead in Stethoscope innovations?
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What year was Gas Lighting invented and how?
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What year was Electric Motor (AC) invented and how?
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When and who invented the Iron Working?
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Which company is ahead in Streetcar (railed) innovations?
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Who invented the Fountain Pen?
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Who invented the Gas Lighting?
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What year was Photography (on film) invented and how?
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What year was Parchment invented and how?
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What year was Microscope invented and how?
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Which company is ahead in Argon innovations?
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When and who invented the X-ray?
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