Wall block
Latest Keystone Retaining Wall Systems, Inc. Patents:
Claims
The ornamental design for a wall block, as shown and described.
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Type: Grant
Filed: Nov 7, 2008
Date of Patent: Feb 23, 2010
Assignee: Keystone Retaining Wall Systems, Inc. (Bloomington, MN)
Inventors: David M. LaCroix (St. Paul, MN), Robert A. MacDonald (Plymouth, MN)
Primary Examiner: T. Chase Nelson
Assistant Examiner: Anhdao Doan
Attorney: Popovich, Wiles & O'Connell, P.A.
Application Number: 29/327,515