Marion Donovan was an American entrepreneur and inventor. After attending Rosemont College for a bachelor’s degree in English, she earned a master’s degree in architecture from Yale University, where she was one of only three women in her graduating class. Donovan later worked as an editor for Harper’s Bazaar and Vogue magazines, until quitting to focus on innovation and patent work. Her biggest success happened after World War II. Donovan was unhappy with the annoying and repetitive routine of changing her daughter’s cloth diapers and the resulting mess on the bedsheets and clothes. Determined to make a solution, she used a shower curtain and a sewing machine developing the first known waterproof diaper cover. Her invention prevented mess as well as chafing and diaper rash. Donovan received four patents for her diaper cover, including plastic snaps to replace safety pins. She started selling the waterproof diaper at Saks Fifth Avenue, where her company and patents became a success and sold for a million dollars to the Keko Corporation.