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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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Who invented the Dacron?
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When and who invented the X-ray?
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When and who invented the Time Recorder?
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What year was Telegraph invented and how?
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What year was Glider invented and how?
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Who invented the Cannon (iron)?
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What year was Gas Lighting invented and how?
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Who invented the Uranium?
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Who invented the Propeller (ship)?
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What year was Airship (rigid) invented and how?
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Who invented the Parchment?
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What year was Electric Motor (DC) invented and how?
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What year was Gyro-Compass invented and how?
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What year was Electromagnet invented and how?
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