Earle Haas
He graduated from the Kansas City College of Osteopathy in 1918 and spent 10 years in Colorado as a country general practitioner, then went to Denver in 1928.He invented a flexible ring for a contraceptive diaphragm (and made $50,000 from selling the patent),[1] sold real estate and was president of a company that manufactured antiseptics.Haas wanted to invent something better than the "rags" his wife and other women had to wear, he said, and got the idea for his tampon from a friend in California who used a sponge in the vagina to absorb menstrual flow.The London Sunday Times newspaper in 1969 named Haas one of the "1000 Makers of the Twentieth Century."After selling the rights to the tampon, he continued with his doctor's practice and various business enterprises.