Patents by Inventor Christian C. A. Lieffertz

Christian C. A. Lieffertz 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).

  • Cribbage board
    Patent number: D300121
    Type: Grant
    Filed: January 10, 1986
    Date of Patent: March 7, 1989
    Inventor: Christian C. A. Lieffertz