Patents Assigned to Structural Block Systems, Inc.
  • Dowel making machine
    Patent number: 5127452
    Abstract: A hollow shaft, threaded on the interior, permits a workpiece, having a square cross section, to be rotated therein and thereby moved axially to be driven against a cutting edge to form the dowel.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: July 7, 1992
    Assignee: Structural Block Systems, Inc.
    Inventor: Arthur L. Wilston
  • Arcuate and curvilinear assemblies comprising tandemly arranged building blocks having degrees of rotation
    Patent number: 5003746
    Abstract: The invention features repeating building block units of generally rectilinear shape, which have arcuate mating end wall surfaces that are rotatable with respect to each other.Curvilinear surfaces of varying degrees of arc can be formed from a tandem array of the block units, such that assemblies of many different shapes can be fabricated.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: April 2, 1991
    Assignee: Structural Block Systems, Inc.
    Inventor: Arthur Wilston