Patents by Inventor William A. Ritchie

William A. Ritchie 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).

  • User selective solution system and method for flashcards, puzzles, and the like
    Patent number: 5797601
    Abstract: A flashcard type device and method adapted for education and entertainment for use by one or multiple participants and providing answers or solutions partitioned into a plurality of pre-defined discrete segments for providing the user with the option of selecting one or more of selected progressive hints or steps to the proper solution.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: August 25, 1998
    Inventor: William A. Ritchie