(19)

(11)

EP 2 370 647 A1

(12)

(43) Date of publication: 05.10.2011 Bulletin 2011/40 (21) Application number: 09835371.7 (22) Date of filing: 03.12.2009

(51) International Patent Classification (IPC):  E04B 2/00(2006.01) (86) International application number: PCT/US2009/006348 (87) International publication number: WO 2010/074701 (01.07.2010 Gazette 2010/26)

(84) Designated Contracting States: 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 SE SI SK SM TR (30) Priority: 03.12.2008 US 200708 P 04.09.2009 US 450001 (71) Applicant: Greenray, Inc. Westford, MA 01886 (US)	(72) Inventors: KING, Zachary, Adam Townsend MA 01469 (US) RUSSELL, Miles, Clayton Westford MA 01886 (US) LITTLE, Ruel, Davenport Concord MA 01642 (US) (74) Representative: Engelhardt, Volker  Engelhardt & Engelhardt Patentanwälte Montafonstrasse 35 88045 Friedrichshafen 88045 Friedrichshafen (DE)