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jan 27, 1940 - 1931 : Electric razor 1932 : Radio telescope; parking meter; folding wheelchair 1933 : Electron microscope; angle-poise lamp 1934 : Cats eyes 1935 : Electric guitar 1936 : Sun tan lotion; electric blanket 1938 :Ballpoint pen; photocopying 1939 : Helicopters; cloud seeding to trigger rain
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By
Lauryn S
24 Sep 2018
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Date:
jan 27, 1940
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~ 85 years ago
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