When were Bifocal Eye Glasses invented?
In the 1700s, bifocal eye glasses were invented by Benjamin Franklin. It has two distinct optical powers and prescribed for the persons with common presbyopic vision problem.
When was Barometer invented?
Between the year 1640 and 1643 a water barometer was invented by an Italian mathematician Gasparo Berti. In the year 1643, an Italian physicist Evangelista Torricelli invented the mercury barometer…. Read more »
When was the first Lawn Mower invented?
In the year 1827, Edwin Budding invented the first lawn mower to cut grass. It was invented in Thrupp, the outward of Stroud town, Gloucestershire in the United Kingdom and… Read more »
When was Kool Aid invented?
The Chemist Edwin Perkins along with his wife Kitty in the year 1927 invented the powdered drink Kool-Aid in Hastings, Nebraska in the United States.
When was Kevlar invented?
In the year 1965, Kevlar was invented by a woman Stephaine Louise Kwolek at DuPont Company in the United States. Kevlar is a strong and light para-aramid synthetic fiber and… Read more »
When was the Kaleidoscope invented?
The Scottish scientist, Sir David Brewster in the year 1816 invented the kaleidoscope and in 1817, he patented it. Kaleidoscope is a toy that consists of a tube comprising of… Read more »
When was the first Crossword Puzzle invented?
In 1913, the English born New York journalist, Arthur Wynne invented the first crossword puzzle of diamond shape that was published in the Sunday New York World on December 21,… Read more »
When were Push Pins invented?
Push pins were invented in 1900 by the inventor Edwin Moore of Pennsylvania in the United States and this invention was described by him as “a pin with a handle”…. Read more »
When was the first parking meter invented?
In the year 1935, the first parking meter known as Black Maria was designed by Holger George Thuesen along with Gerald A. Hale. On 16th July 1935 it was first… Read more »
When was Liquid Paper invented?
Bette Nesmith Graham invented the liquid paper in the year 1951. It is mainly used to correct mistakes during typewriting and handwriting. It is a trademark of Newell Rubbermaid Company… Read more »