(19)

(11)

EP 0 594 721 A1

(12)

(43) Date of publication: 04.05.1994 Bulletin 1994/18 (21) Application number: 92915431.0 (22) Date of filing: 15.07.1992

(51) International Patent Classification (IPC):  G09F 7/ 00( . ) G09F 15/ 00( . ) (86) International application number: PCT/GB1992/001292 (87) International publication number: WO 1993/002441 (04.02.1993 Gazette 1993/04)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 16.07.1991 NZ 19880002389 05.08.1991 NZ 19600002392 06.11.1991 NZ 19930002404 (71) Applicant: BICKER, Robert Laurence Murrays Bay, Auckland 1310 (NZ)	(72) Inventor: BICKER, Robert Laurence Murrays Bay, Auckland 1310 (NZ) (74) Representative: Rackham, Stephen Neil  GILL JENNINGS & EVERY, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)