(19)

(11)

EP 1 214 484 A1

(12)

(43) Date of publication: 19.06.2002 Bulletin 2002/25 (21) Application number: 00959880.6 (22) Date of filing: 31.08.2000

(51) International Patent Classification (IPC)7: E04C 2/00 (86) International application number: PCT/US0024/304 (87) International publication number: WO 0118/318 (15.03.2001 Gazette 2001/11)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 03.09.1999 US 389607 30.06.2000 US 609189 (71) Applicant: Niemann, Michael H. Johnston, IA 50131 (US)	(72) Inventor: Niemann, Michael H. Johnston, IA 50131 (US) (74) Representative: Ebner von Eschenbach, Jennifer et al Ladas & Parry,Dachauerstrasse 37 80335 München 80335 München (DE)