Patio stone
Latest Keystone Retaining Wall Systems, Inc. Patents:
The drawings show four variants of the design which do not differ substantially from each other.
Claims
The ornamental design for a patio stone, as shown and described.
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Type: Grant
Filed: Sep 16, 2011
Date of Patent: Jun 5, 2012
Assignee: Keystone Retaining Wall Systems, Inc. (Minneapolis, MN)
Inventor: Thomas S. Riccobene (Albuquerque, NM)
Primary Examiner: Anhdao Doan
Attorney: Greer, Burns & Brain, Ltd.
Application Number: 29/401,904