Patents by Inventor Sybil E. Willingham

Sybil E. Willingham 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).

  • Cage
    Patent number: D299567
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: January 24, 1989
    Inventor: Sybil E. Willingham
  • Cage
    Patent number: D300377
    Type: Grant
    Filed: July 21, 1986
    Date of Patent: March 21, 1989
    Inventor: Sybil E. Willingham