10. The Car Heater
Margaret A. Wilcox is a mechanical engineer in her time. She was born in Chicago, US. She invented the first car heater in 1893. The air would be directed from over the engine and warm the interior. It is good in foggy and frigid weather by keeping the interior warm to make the passenger comfortable. She also invented a combination of clothes and a dishwasher.
11. Windshield Wiper
Mary Anderson was an inventor of the windshield wiper. She was granted her patent in 1903. It is an automatic car window cleaning device that can b controlled from inside the car.
The Kevlar was invented by the American chemist Stephanie Kwolek. It was more substantial than nylon and steel. This super-strong Kevlar fiber is used to make bullet-proof vests, cables, ropes, airplanes, boats, and more.
13. The Icecream Freezer
Nancy Johnson was granted a patent for her invention of the ice-cream freezer in 1843. It helps in reducing the time taken in making ice cream. With this ice-cream freezer, we can make ice cream faster and easier than by hand.