Patents Assigned to ECC Construction Materials Limited
  • Building block
    Patent number: 5131202
    Abstract: A building block, at least one face of which has a recessed surface along at least a portion of its periphery. The recessed surface is of non-uniform width and, at least in part, defines a surface of irregular shape. Each remaining face of the block has a surface of regular geometric shape facilitating laying of the block.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: July 21, 1992
    Assignee: ECC Construction Materials Limited
    Inventor: Peter A. Ball