Liquid Paper
Liquid Paper, also called white out and correction fluid, is used to correct mistakes made in writing on typewriters and with ink. It was originally called Mistake Out and was invented by Bette Nesmith Graham in 1951, who was working at a bank in the U.S. state of Texas at time and had trouble when she typed on the typewriter, which was part of her job. She made the product by mixing the required substances with her blender and sold it to friends starting in 1956. She sold the product to the Gillette Corporation for 47.5 million US Dollars in 1979. When she died the following year, her son, Michael Nesmith, a famous musician, formally of The Monkees inherited the fortune.