On this date in 1970, Jennings C. Clement of Lufkin, Texas received a U.S. Patent for his invention, a device “for use in aiding coition when physical weakness caused by genital infirmities or psychological complexes may be present in the male.” The device, which consists of a sleeve and hand pump is “applied to the male organ to cause erection by forcing outward flow of blood and preventing inward or return flow of blood toward the body and the heart”. Source: SexPatentsTheBook.com