-
Air dryer
The air dryer was invented a a girl in germany who attached a hose to a vacuum cleaner -
Q-tips
Leo Gerstenzag had took his wife invention and put it on the market. It was called Baby Gays at first. In 1926, he changed the name to Q-Tips® Baby Gays. The Q stand for quality. -
Trafic light
The first four-way, three-color traffic light was invented by police officer William Potts. He used red, amber and green lights and $37 worth of wire to make his traffic light -
Lie detector
John A. Larson was the inventer of the lie detector test. He was a medical student when he invented the test in Califorina. -
Band-Aid
Earle Dickson created the band aid for his wife because Josephine DIckson was cutting herself every day. -
Bulldozer
The Bulldozer was invented by Engineer Benjamin Holt. It was a crawling tracter which he called the caterpillar. LaPlant-Choate Manufacturing Company had produced the first bulldozer. -
Liquid-propellant rocket
The first flight of a liquid-propellant rocket took place at Auburn, Massachusetts, when American professor Dr. Robert H. Goddard launched a vehicle using liquid oxygen and gasoline as propellants. -
Kool-Aid
Kool-Aid was invented by Edwin Perkins of Omaha, Nebraska. The original name was called Fruit Smack. -
Mecanical Bread slicer
The bread slicer was invented by Otto Frederick Rowedder he was living in Iowa and he worked on it every since 1912.
