Patents Assigned to The Medevice Company
  • Contraceptive
    Patent number: 3952737
    Abstract: A contraceptive device in the form of a pessary or cervical cap for attachment to the cervix, comprising a valve mechanism to permit outflow of material from the cervix and prevent inflow of material into the cervix.
    Type: Grant
    Filed: August 28, 1974
    Date of Patent: April 27, 1976
    Assignee: The Medevice Company
    Inventors: Donald E. Lipfert, Seymour L. Romney, Robert Zeidman, Willfred Goldschmidt