Patents by Inventor Charles A. Shirk

Charles A. Shirk 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).

  • Cat toy
    Patent number: 4907537
    Abstract: A cat toy with an ovate-shaped configuration having a weight inserted into a recessed area in the front section and a tail piece protruding from the rear section. When manipulated by a cord attached in a front to rear through configuration, the toy moves and rolls in unpredictable ways creating an enticing toy cats will chase.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: March 13, 1990
    Inventor: Charles A. Shirk