Patents by Inventor Daniel R. Mishell, Jr.

Daniel R. Mishell, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Intravaginal ring
    Patent number: 4292965
    Abstract: This invention relates to an improved intravaginal ring for use as a contraceptive comprising an inert elastomer core, a medicated layer encircling the core and an outer inert elastomer layer and method of manufacturing the intravaginal ring.
    Type: Grant
    Filed: December 29, 1978
    Date of Patent: October 6, 1981
    Assignee: The Population Council, Inc.
    Inventors: Harold A. Nash, Daniel R. Mishell, Jr.