 Bicycle tires used as spastelnye vests (Germany, 1925)  Single-wheel motorcycle (1931)The maximum speed of 150 km / h  Floating bike All Terrain Vehicle (England, 1936)Was able to go down the slope to 65 degrees.  Radio stroller (U.S., 1921) Radio Hat (USA, 1931)Portable radio in a straw hat.  Bulletproof Glass (New York, 1931) A long convoy (France, 1934) Piano to paralyze (England, 1935) Points for reading in bed (England, 1936) Electrically heated jacket (U.S., 1932) A car with a shovel for pedestrians (Paris, 1924)  Early GPS (1932) Foldable Bridge (Netherlands, 1926) Newspapers sent by fax (1938) Protecting the face from blizzards (Canada, 1939) The stroller is resistant to gas attacks (England, Heksteybl, 1938) The camera-gun (New York, 1938)
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