U.S. Commerce Dept. @CommerceGov
With 49 patents, Beulah Louise Henry was one of the most prolific inventors of the 20th century. Learn more about her story in @USPTO's #JourneysofInnovation story: https://t.co/XA9LAx0BFR https://t.co/LsO63ZhYjG — PolitiTweet.org