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Sir Frank Whittle and Dr Hans von Ohain both invent the jet engine
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Germans Max Knott and Ernst Ruska invent the electron microscope together.
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Karl Jansky invents the radio telescope.
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Frequency modulation (FM radio) invented by Edwin Armstrong.
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Englishmen, Percy Shaw invents cat eyes/road reflectors.
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Wallace Carothers and DuPont Labs invents nylon.
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