Patents by Inventor Vivian David

Vivian David 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).

  • Patent number: D249571
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: September 19, 1978
    Assignee: Drawbridge, Inc.
    Inventors: Vivian David, Ronald Emmerling