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EP 2 920 367 A1

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(43) Date of publication: 23.09.2015 Bulletin 2015/39 (21) Application number: 13855225.2 (22) Date of filing: 15.11.2013

(51) International Patent Classification (IPC):  E01C 5/00(2006.01) E04C 1/00(2006.01) E02B 3/14(2006.01) E01C 11/22(2006.01) E04C 2/38(2006.01) (86) International application number: PCT/US2013/070428 (87) International publication number: WO 2014/078738 (22.05.2014 Gazette 2014/21)

(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 Designated Extension States: BA ME (30) Priority: 16.11.2012 US 201261727472 P (71) Applicant: Keystone Retaining Wall Systems LLC Minneapolis, MN 55435 (US)	(72) Inventors: RICCOBENE, Thomas S. Albuquerque, New Mexico 87107 (US) MACDONALD, Robert A. Plymouth, Minnesota 55441 (US) (74) Representative: Flosdorff, Jürgen  Huss, Flosdorff & Partner GbR Klarweinstraße 39 82467 Garmisch-Partenkirchen 82467 Garmisch-Partenkirchen (DE)