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Hair Dryer
The hair dryer was invented in Germany. The inventor was a woman who inserted a hose in the exhaust of a vacuum cleaner. -
Q-Tips
The name for Q-Tips used to be Baby Gays. It was invented by the wife of Leo Gerstenzang, Mr. Gerstenzang only put the invention out on the market. -
Traffic Light
Invented by police officer; William Potts. Used red, amber and green lights, it took an additional 37$ to create his traffic light. -
Automobile with a combustible engine
Invented by Henry Ford; the automobile with a combustible engine was the most popular inventionn in the 1920s. Because of this, new jobs were created. -
Band-Aid
Invented by a man named Earle Dickson. Only reason why he invented it was because his wife Josephine Dickson was cutting herself every day. -
Period: to
1920-1929
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Tommy Gun
By 1925, this gun became a recognised symbol of American gangland and violence. It was invented by John T Thompson. It was originally distributed by small quantities to the US Postal Service to avoid the looting of mail. -
Lie Detector
John A. Larson was the inventor of the lie detector test, he was a medical student in California when it was invented. -
Bulldozer
The Bulldozer was invented by Engineer Benjamin Holt, he built a crawlimng tractor he dubbed the 'caterpillar'. LaPlant-Choare Manufacturing Company produced the first bulldozer in 1923. -
Liquid-Fueled Rocket
Invented by Robert Goddard, NASA still uses it today. -
Bread Slicer
Invented by Otto Frederick Rowedder, he lived in Iowa. He worked on his invention since 1912; the end product was a machine that successfully cuts and wraps a loaf of bread.
