Patents by Inventor Robert R. Kowalski

Robert R. Kowalski 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).

  • Playing card holder
    Patent number: D246062
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: October 11, 1977
    Inventor: Robert R. Kowalski
  • Poker aid card
    Patent number: D249084
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: August 22, 1978
    Inventor: Robert R. Kowalski
  • Pinochle aid card
    Patent number: D256927
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: September 16, 1980
    Inventor: Robert R. Kowalski