Patents by Inventor Paul D. Grimsley

Paul D. Grimsley 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).

  • Exercise and memory game
    Patent number: 5836835
    Abstract: A hopscotch like and math instruction game comprising a mat having a plurality of zones on one surface respectively containing a plurality of ramndomly selected single digit numerals permitting players to play the game within the perameters therof.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: November 17, 1998
    Inventor: Paul D. Grimsley