Patents by Inventor Kenneth J. Harder

Kenneth J. Harder 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).

  • Patent number: 4316612
    Abstract: An educational board game for up to four players. The game equipment includes a square game board, a plurality of strips on each of which is printed an algebraic equation or inequality to be solved. The strips are color coded to reflect the relative difficulty of the equations and inequalities thereon. A plurality of similarily coded markers are also provided. Each marker has printed thereon a portion of an equation or inequality. The board is provided with areas adjacent each side which are demarcated to receive, firstly, an equation or inequality strip and, secondly, a plurality of markers which are placed on the board during the play of the game by the players in their efforts to solve the associated equation or inequality. The equipment also includes a plurality of timers having different timing periods, a selected one of which is used to time the game. After a timing period, the board is rotated 90 degrees to allow the players to check the work of each other.
    Type: Grant
    Filed: March 14, 1980
    Date of Patent: February 23, 1982
    Inventor: Kenneth J. Harder