Patents Assigned to Pro Board, Inc.
  • Cement finisher's knee board
    Patent number: 4789046
    Abstract: A rigid light weight knee board for cement finishers. The body of the knee board comprises a high density extruded closed cell polystyrene foam. A water repellent cover made from soft pliable vinyl is provided for the board and includes an upright handle strap.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: December 6, 1988
    Assignee: Pro Board, Inc.
    Inventor: Neil A. McDowall