(19)

(11)

EP 0 465 460 A1

(12)

(43) Date of publication: 15.01.1992 Bulletin 1992/03 (21) Application number: 89902800.0 (22) Date of filing: 09.02.1989

(51) International Patent Classification (IPC):  H04S 1/ 00( . ) (86) International application number: PCT/GB1989/000127 (87) International publication number: WO 1990/009728 (23.08.1990 Gazette 1990/20)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (71) Applicant: BARTON, Geoffrey James HERTS EN5 4RY (GB)	(72) Inventor: BARTON, Geoffrey James HERTS EN5 4RY (GB) (74) Representative: Baillie, Iain Cameron, et al  c/o Ladas & Parry Altheimer Eck 2 D-80331 München D-80331 München (DE)