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Who invented the Argon?
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Which company is ahead in Autogiro innovations?
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What year was Autogiro invented and how?
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Which company is ahead in Machine Gun innovations?
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When and who invented the X-ray?
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Who invented the Refrigerator?
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Who invented the Loom (power)?
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When and who invented the Time Recorder?
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Who invented the Uranium?
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What year was Printing (Rotary) invented and how?
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Who invented the Parchment?
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