Wall block
Latest Keystone Retaining Wall Systems, Inc. Patents:
Claims
The ornamental design for a wall block, as shown and described.
D62880 | August 1923 | Castellani |
D75212 | May 1928 | Clune |
1953005 | March 1934 | Nagel |
D135257 | March 1943 | Larson |
D185611 | June 1959 | Paulson |
D186371 | October 1959 | Johnson |
D188320 | July 1960 | Frese |
4557634 | December 10, 1985 | Vidal |
D392052 | March 10, 1998 | Youssefian |
D501935 | February 15, 2005 | Dawson et al. |
D511846 | November 22, 2005 | Evans |
6978580 | December 27, 2005 | Clark et al. |
D538946 | March 20, 2007 | Mugge et al. |
D539436 | March 27, 2007 | Magliocco et al. |
D547881 | July 31, 2007 | Price et al. |
D548367 | August 7, 2007 | Price |
D556919 | December 4, 2007 | Price |
7497646 | March 3, 2009 | Price |
D592318 | May 12, 2009 | Ruegsegger |
7645098 | January 12, 2010 | Rainey |
20050016106 | January 27, 2005 | Dawson et al. |
WO 86/04947 | August 1986 | WO |
WO 2005/009707 | February 2005 | WO |
WO 2009/062000 | May 2009 | WO |
- Jul. 8, 2009 International Search Report and Written Opinion for corresponding PCT Application Serial No. PCT/US2008/082749 (16 pages).
Type: Grant
Filed: Jan 8, 2010
Date of Patent: Sep 28, 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: 29/353,457