Ventilating concrete block

- Warren F. B. Lindsley
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Description

FIG. 1 is a perspective view of one side, one end _and bottom of the ventilating concrete block embodying the _invention; and _

FIG. 2 is a perspective view of the top, other _side and other end of the ventilating concrete block shown _in FIG. 1.

Referenced Cited
U.S. Patent Documents
D168221 November 1952 Gonnella
D196970 November 1963 Fulwider
D246386 November 15, 1977 Hardin
Patent History
Patent number: D264997
Type: Grant
Filed: Apr 11, 1980
Date of Patent: Jun 15, 1982
Assignee: Warren F. B. Lindsley (Phoenix, AZ)
Inventor: Arnold C. Siedschlag (Phoenix, AZ)
Primary Examiner: A. Hugo Word
Attorney: Warren F. B. Lindsley
Application Number: 6/139,279
Classifications
Current U.S. Class: D25/97; D25/80; D25/91
International Classification: D2501;