(19)

(11)

EP 2 071 916 A1

(12)

(43) Date of publication: 24.06.2009 Bulletin 2009/26 (21) Application number: 07768796.0 (22) Date of filing: 18.07.2007

(51) International Patent Classification (IPC):  A61F 2/28(2006.01) (86) International application number: PCT/KR2007/003469 (87) International publication number: WO 2008/038897 (03.04.2008 Gazette 2008/14)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 28.09.2006 KR 20060094808 (71) Applicant: Korea Institute Of Machinery & Materials Daejeon-City 305-343 (KR)	(72) Inventors: PARK, Dong-Soo Seoul 135-778 (KR) HAHN, Byung-Dong Gyeongsangnam-do 641-010 (KR) (74) Representative: Kihn, Pierre Emile Joseph et al Office Ernest T. Freylinger S.A. 234, route d'Arlon B.P. 48 8001 Strassen 8001 Strassen (LU)