According to the National Peanut Board, George Washington Carver did not invent peanut butter.
"In 1884 Marcellus Gilmore Edson of Canada patented peanut paste, the finished product from milling roasted peanuts between two heated surfaces. In 1895 Dr. John Harvey Kellogg (the creator of Kellogg’s cereal) patented a process for creating peanut butter from raw peanuts. He marketed it as a nutritious protein substitute for people who could hardly chew on solid food. In 1903, Dr. Ambrose Straub of St. Louis, Missouri, patented a peanut-butter-making machine."