(19)
(11) EP 2 542 723 A2

(12)

(88) Date of publication A3:
21.06.2012

(43) Date of publication:
09.01.2013 Bulletin 2013/02

(21) Application number: 11707971.5

(22) Date of filing: 01.03.2011
(51) International Patent Classification (IPC): 
E02D 29/02(2006.01)
(86) International application number:
PCT/US2011/026638
(87) International publication number:
WO 2011/109360 (09.09.2011 Gazette 2011/36)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 02.03.2010 US 309650 P

(71) Applicant: Keystone Retaining Wall Systems, Inc.
Bloomington, Minnesota 55435 (US)

(72) Inventor:
  • MACDONALD, Robert
    Plymouth Minnesota 55441 (US)

(74) Representative: Howe, Steven 
Reddie & Grose LLP 16 Theobalds Road
London WC1X 8PL
London WC1X 8PL (GB)

   


(54) RETAINING WALL BLOCK SYSTEM