(19)
(11) EP 2 920 367 A1

(12)

(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)

   


(54) CONNECTION SURFACE FOR A STRUCTURAL UNIT