Patents by Inventor Egbert Campbell

Egbert Campbell 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).

  • Spinning toy
    Patent number: D310693
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: September 18, 1990
    Inventor: Egbert Campbell