Patents Assigned to James William Stevenson
  • Portable pitcher's mound
    Patent number: 4925186
    Abstract: A pitcher's mound on, which a pitcher in the sport of Baseball stands while pitching the ball, is collapsible, and is made up of several wedge-shaped segments which are connected to a central hub in an easily releasable manner. The segments and the central hub are quite rigid yet are of a size and weight which makes them reasonably portable. The surface of the pitcher's mound can be such as to absorb impact when struck by a ball and to provide good footing for the pitcher.
    Type: Grant
    Filed: September 22, 1988
    Date of Patent: May 15, 1990
    Assignee: James William Stevenson
    Inventors: James W. Stevenson, Paul T. Arato