Patents Assigned to Klisan, Inc.
  • Child's play block with card-retaining tangs
    Patent number: 4077153
    Abstract: A child's play block having a continuous periphery of material width with a central strengthening web and card retaining tangs adjacent thereto for the reception of picture card inserts which are color coded to the color of the block.
    Type: Grant
    Filed: July 19, 1973
    Date of Patent: March 7, 1978
    Assignee: Klisan, Inc.
    Inventors: George W. Dunbar, Jerrold J. Krumholz