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EP 0 746 828 A1

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(43) Date of publication: 11.12.1996 Bulletin 1996/50 (21) Application number: 95940921.0 (22) Date of filing: 20.12.1995

(51) International Patent Classification (IPC):  G07D 7/ 00( . ) (86) International application number: PCT/BG1995/000013 (87) International publication number: WO 1996/019781 (27.06.1996 Gazette 1996/29)

(84) Designated Contracting States: GR IT (30) Priority: 21.12.1994 BG 19940099278 (71) Applicant: Riss Int. S.A. 1618 Sofia (BG)

(72) Inventors: STOYANOVA, Nadezhda Assenova 1000 Sofia (BG) HRISTOV, Rouslan Vilev 1220 Sofia (BG) DJADALA-MARIA, Jamil Alexander 1404 Sofia (BG) STOYANOV, Assen Dimitrov 1303 Sofia (BG) PELOV, Nikolay Viktorov 1000 Sofia (BG) DJABAROV, Georgy Nikolov 1000 Sofia (BG) (74) Representative: Tiedtke, Harro, Dipl.-Ing.  Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4 80336 München 80336 München (DE)