Title: Interlocking building block

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.

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Inventors: Hancock, Norman Lee (St. Louis, MO, US)

Application Number: 548882
Filing Date: 1975-02-10
Publication_date: 1976-02-10
Assignee:
Primary Class(es): 52/592.6 52/603, 52/605
Other Classes:
US Patent Ref:

1115542	Nov, 1914	Hudson	52/591.
1472911	Nov, 1923	Hundley	52/591.
2619829	Dec, 1952	Tatum	52/591.
3012377	Dec, 1961	Sunukjian	52/603.
3427774	Feb, 1969	Curtis	52/605.
3795079	Mar, 1974	Klem	52/603.

Other Refs: 760,804

Nov, 1956	UK

Primary Examiner: Bell, J. Karl
Assistant Examiner:
Attorney: Cohn, Powell & Hind