On this date in 1900, Joseph Lees of Summit Hill, Pennsylvania received a U.S. Patent for his invention, a device to prevent nocturnal seminal emissions. The device worn by a sleeping man would electrically activate a bell or other alarm when the man’s penis became erect thereby awakening the man and preventing the involuntary emission. To see more interesting and humorous sex related patents, check out a free preview of my new book at SexPatentsTheBook.com