Bike Tyre Used As Swimming Aid (Germany, 1925)
 
 A group of youngsters tied a bike tyre around the body as a swimming  aid.
 One Wheel Motorcycle (1931)
 
 One wheel motorcycle (invented by Italian M. Goventosa de Udine).  Maximum speed: 150 kilometers per hour ( 93 Mph).
 Amphibious Bike ‘Cyclomer’ (Paris, 1932)
 
 The Cyclomer, a bicycle on land and water  can ride with a load of 120 pounds.
 All Terrain Car (England, 1936)
 
 All terrain car able to descend slopes up to 65 degrees.
 Radio Pram (USA, 1921)
 
 Pram provided with a radio, including antenna and loudspeaker, to keep  the baby quiet.
 Radio hat (USA, 1931)
 
 Portable radio in a straw hat, made by an American inventor.
 Bulletproof Glass (New York, 1931)
 
 Bulletproof glass, demonstration by the best rifle man of the New York  police, 1931.
 Extensible Caravan (France, 1934)
 
 Extensible caravan, built by a French engineer.
 Piano For The Bedridden (UK, 1935)
 
 Piano especially designed for people who are confined to bed.
 Glasses For Reading In Bed (England, 1936)
 
 Hamblin glasses. A pair of spectacles especially designed for reading in bed.
 Electrically Heated Jacket (USA, 1932)
 
 Electrically heated vest, developed for  the traffic police in the United  States. The power is supplied by  electric contacts in the street.
 Car With Shovel For Pedestrians (Paris, 1924)
 
 Kind of shovel on a car. Purpose: reducing the number of casualties  among pedestrians.
 Early GPS (1932)
 
 
 Sort of TomTom, early tripmaster. Works  using rolling key map. The map passes the  screen in a tempo that  depends on the speed of the car.
 Folding Emergency Bridge (Netherlands, 1926)
 
 Folding bridge for emergencies, invented by L. Deth can easily be transported on a handcart.
 Faxed Newspaper (1938)
 
 In 1938 the first wireless newspaper was  sent from WOR radiostation in  New York. Photo shows children reading  the children’s page of a Missouri  paper.
 Face Protection From Snowstorms (Canada, 1939)
 
 Used to protect ones face from snowstorms. Canada, Montreal, 1939.
 Gas War Resistant Pram (England, Hextable, 1938)
 
 Revolver Camera (New York, 1938)
 
 Colt 38 carrying a small camera that  automatically takes a picture when you pull the trigger. At the left:  six pictures taken by the camera.