Patents Examined by Mitchell Brown
  • Contraceptive device
    Patent number: 4932422
    Abstract: A contraceptive device having a cylindrical body adapted to be retained within the cervix having a valve mechanism adapted to allow passage of menstrual fluid yet blocking seminal fluid.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: June 12, 1990
    Inventor: Gamal A. Ragheb