Skin color - patchy. Patchy skin color is areas where the skin color is irregular. Mottling or mottled skin refers to blood vessel changes in the skin that cause a patchy appearance. Irregular or patchy discoloration of the skin can be caused by: Changes in melanin, a substance produced in the skin cells that gives skin its color.
Thomas Edison. Thomas Alva Edison (February 11, 1847 â October 18, 1931) was an American inventor and businessman, who has been described as America's greatest inventor. He developed many devices that greatly influenced life around the world, including the phonograph, the motion picture camera, and the long-lasting, practical electric light bulb.
1878 Thomas Edison founded the Edison Electric Light Company 1878 Hiram Maxim founded the United States Electric Lighting Company 1878 205,144 William Sawyer and Albon Man 6/18 for Improvements in Electric Lamps 1878 Swan receives a UK patent for an improved.