sentences:  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), 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.