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When and who invented the Skyscraper?
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What year was Photography (on paper) invented and how?
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When and who invented the Electric Fan?
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Which company is ahead in Vaccination innovations?
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Who invented the Gas Lighting?
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Who invented the Cash Register?
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When and who invented the Slide Rule?
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What year was Steam Engine (piston) invented and how?
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When and who invented the X-ray?
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When and who invented the Ballpoint Pen?
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Which company is ahead in Streetcar (railed) innovations?
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When and who invented the Bifocal Lens?
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Which company is ahead in Gramophone innovations?
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Who invented the Carpet Sweeper?
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Which company is ahead in Lathe innovations?
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Who invented the Propeller (ship)?
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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 Welder (electric welding)?
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Who invented the Lightning Conductor?
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What year was Cellophane invented and how?
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Which company is ahead in Tank (military) innovations?
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What year was Cash Register invented and how?
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Which company is ahead in Stethoscope innovations?
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When and who invented the Balloon?
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