There are also three credited inventors for the paper bag, Margaret Knight, Francis Wolle, and Luther Childs Crowell. Margaret Knight, also known as the mother of paper bags, invented the square bottomed paper bag; even though Crowell made a patent for it. Francis Wolle was the inventor of a machine to make the square bottomed paper bags. Wolle was a botanist, clergyman, and a teacher, who apparently had the money to make a machine on a teacher’s salary. Luther Childs Crowell was the man mentioned previous, who made the patent for the square bottomed paper bag. Luther acknowledged Knight as the true inventor, but declared that he had rights to make and sell the bag. He filed almost 300 patents.