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Patent
   D299067
Priority
Sep 15 1986
Filed
Apr 02 1987
Issued
Dec 20 1988
Expiry
Dec 20 2002
Inventors
Forsberg, …
Assg.orig
Keystone R…
Assg.curr
Keystone R…
Entity
unknown
Referenced by
84
References
9
Maint.:
n/a
The ornamental design for a modular block wall as shown and described.

FIG. 1 is a perspective view of a modular block wall showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a side view of the left side thereof, the opposite side being a mirror image thereof; and

FIG. 5 is a bottom plan view thereof.
INVENTORS:

Forsberg, Paul J.

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THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2882689,
4014693, Apr 21 1966 Xerox Corporation Electroviscous recording
4312606, Mar 21 1980 Interlocking prefabricated retaining wall system
4496266, Dec 30 1981 Kronimus & Sohn GmbH & Co. KG Curved like paving stone element for use in setting a curved paving
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ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Mar 25 1987FORSBERG, PAUL J Keystone Retaining Wall SystemsASSIGNMENT OF ASSIGNORS INTEREST 0046880764 pdf
Apr 02 1987Keystone Retaining Wall Systems, Inc.(assignment on the face of the patent)
Sep 15 1997KEYSTONE RETAINING WALL SYSTEMS, INC U S BANK NATIONAL ASSOCIATIONSECURITY AGREEMENT0087320302 pdf
Dec 21 1999U S BANK NATIONAL ASSOCIATIONKEYSTONE RETAINING WALL SYSTEMS, INC RELEASE BY SECURED PARTY SEE DOCUMENT FOR DETAILS 0112380432 pdf
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