(19)

(11)

EP 0 885 428 A2

(12)

(43) Date of publication: 23.12.1998 Bulletin 1998/52 (21) Application number: 96938383.0 (22) Date of filing: 15.11.1996

(51) International Patent Classification (IPC):  G06F 3/ 033( . ) G06F 3/ 045( . ) (86) International application number: PCT/GB1996/002830 (87) International publication number: WO 1997/020287 (05.06.1997 Gazette 1997/24)

(84) Designated Contracting States: DE GB IT NL SE (30) Priority: 15.11.1995 GB 19950023506 (71) Applicants: Tagg, James, Peter Methuen, MA 01844 (US) Campbell, Alistair, James Cambridge, MA 02138 (US)	(72) Inventors: Tagg, James, Peter Methuen, MA 01844 (US) Campbell, Alistair, James Cambridge, MA 02138 (US) (74) Representative: Brandon, Paul Laurence, et al  APPLEYARD LEES, 15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)