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Patent
   D264997
Priority
Apr 11 1980
Filed
Apr 11 1980
Issued
Jun 15 1982
Expiry
Jun 15 1996
Inventors
Siedschlag…
Assg.orig
Warren F. …
Assg.curr
LINDSLEY, …
Entity
unknown
Referenced by
0
References
3
Maint.:
n/a
The ornamental design for a ventilating concrete block, as shown and described.

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.
INVENTORS:

Siedschlag, Arnold C.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
168221,
196970,
D246386, Nov 17 1975 Concrete block
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Apr 11 1980Warren F. B., Lindsley(assignment on the face of the patent)
Feb 11 1982SIEDSCHLAG, ARNOLD C LINDSLEY, WARREN F B ASSIGNMENT OF A PART OF ASSIGNORS INTEREST0039490096 pdf
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