lemelson.mit.edu

E1AXd TIL Lydia O'Leary, a woman who was insecure due to a large birthmark on her face, created a product to hide it that was inspired by her experiments with oil paint. She was granted a patent for her concealer in 1932. It's the only foundation with a USPTO patent.
xVmJ7 TIL THAT Lewis H. Latimer created the carbon filament light bulb that improved Edison’s initial prototype.
R7rd1 TIL when HP was being named, William Hewlett & David Packard were unsure of the order to put their names so they decided by simply flipping a coin. Hewlett won.