Patents by Inventor Norman Lee Hancock

Norman Lee Hancock has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Interlocking building block
    Patent number: 3936989
    Abstract: This building block includes upper and lower sides having longitudinally extending ribs and grooves respectively interfitting with the grooves and ribs of compatibly formed blocks. The ribs and grooves include spaced faces inclined in the same general direction and interconnected by a transverse flat face. In the building wall construction corner blocks are provided having a partial rib and full groove; end blocks are provided having a partial groove and no rib, and cap blocks are provided having a full groove and no rib.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: February 10, 1976
    Inventor: Norman Lee Hancock