(19)

(11)

EP 0 683 909 A1

(12)

(43) Date of publication: 29.11.1995 Bulletin 1995/48 (21) Application number: 94908774.0 (22) Date of filing: 10.02.1994

(51) International Patent Classification (IPC):  G06F 12/ 12( . ) (86) International application number: PCT/US1994/001550 (87) International publication number: WO 1994/018625 (18.08.1994 Gazette 1994/19)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 12.02.1993 US 19930017068 (71) Applicant: UNISYS CORPORATION Blue Bell, PA 19424 (US)	(72) Inventor: FRANDEEN, James, W. Soquel, CA 95073 (US) (74) Representative: Modiano, Guido, Dr.-Ing., et al  Modiano, Josif, Pisanty & Staub, Baaderstrasse 3 D-80469 München D-80469 München (DE)