(19)

(11)

EP 0 636 264 A1

(12)

(43) Date of publication: 01.02.1995 Bulletin 1995/05 (21) Application number: 93907887.0 (22) Date of filing: 06.04.1993

(51) International Patent Classification (IPC):  G07D 3/ 04( . ) G07D 3/ 14( . ) (86) International application number: PCT/FI1993/000146 (87) International publication number: WO 1993/021607 (28.10.1993 Gazette 1993/26)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE (30) Priority: 16.04.1992 FI 19920001726 (71) Applicant: DATALAB OY SF-02130 Espoo (FI)	(72) Inventor: VIHAVAINEN, Terho SF-00960 Helsinki (FI) (74) Representative: Lins, Edgar, Dipl.-Phys. Dr.jur.  Patentanwälte Gramm + Lins Theodor-Heuss-Strasse 1 D-38122 Braunschweig D-38122 Braunschweig (DE)