Patents Assigned to Pavestone Company, LLC
  • Patent number: 8291669
    Abstract: A structural block is provided. The structural block has a top and a bottom. A first sidewall section is between the top and the bottom. A second sidewall section is between the first sidewall section and one of the top or the bottom, and the second sidewall section is angularly disposed relative to the first sidewall section, so as to form a feature that interlocks with an adjacent structural block.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: October 23, 2012
    Assignee: Pavestone Company, LLC
    Inventor: William Howard Karau
  • Patent number: 8028688
    Abstract: An apparatus for splitting a concrete block and pitching at least one edge of the split concrete block is provided. The apparatus includes a splitting blade have a blade edge, such as a sharpened edge or a dull edge. The splitting blade is configured to move in a first direction so as to split a concrete block into two or more sections. The apparatus also includes a pitching blade having a blade edge, such as a sharpened and adjacent to the splitting blade, the pitching blade edge vertically offset from the splitting blade edge so as to pitch an edge of one of the sections of the concrete block after the concrete block has been split.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: October 4, 2011
    Assignee: Pavestone Company, LLC
    Inventors: William Howard Karau, Joerg Marx
  • Patent number: D674117
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: January 8, 2013
    Assignee: Pavestone Company, LLC
    Inventors: Marcel H. Thomassen, William H. Karau, Jorg Marx