(19)

(11)

EP 1 738 041 A1

(12)

(43) Date of publication: 03.01.2007 Bulletin 2007/01 (21) Application number: 04761510.9 (22) Date of filing: 15.09.2004

(51) International Patent Classification (IPC):  E04H 6/08(2006.01) (86) International application number: PCT/BG2004/000018 (87) International publication number: WO 2005/098171 (20.10.2005 Gazette 2005/42)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 06.04.2004 BG 10866704 (71) Applicant: Petkov, Mihail Danev 1408 Sofia (BG)	(72) Inventors: PETKOV, Mihail, Danev 1408 Sofia (BG) IVANOV, Lyudmil, Ivanov 1000 Sofia (BG) STRASHIMIROV, Asen, Strashimirov 1407 Sofia (BG) (74) Representative: Yanakieva-Zlatareva, Maria Nikolova  Central P.O. Box 230 1000 Sofia 1000 Sofia (BG)