Happy Valentines Day 2020 Posted on February 14, 2020 by bwheelock U.S. Patent No. 1,353,709 U.S. Patent No. 5,561,928 U.S. Patent No. 7,001,319 U.S. Patent No. 3,610,510 U.S. Patent No. 6,505,425 U.S. Patent No. 6,024,386