(19)

(11)

EP 0 525 077 A1

(12)

(43) Date of publication: 03.02.1993 Bulletin 1993/05 (21) Application number: 91908506.0 (22) Date of filing: 15.04.1991

(51) International Patent Classification (IPC):  A61F 2/ 20( . ) (86) International application number: PCT/GB1991/000588 (87) International publication number: WO 1991/016011 (31.10.1991 Gazette 1991/25)

(84) Designated Contracting States: AT BE CH DE ES FR GB IT LI NL (30) Priority: 17.04.1990 GB 19900008497 (71) Applicant: SPEECH-AID LIMITED Staffordshire ST5 5SP (GB)	(72) Inventor: IKIN, Graham, John 3 Wharf Terrace Madeley Heath Cheshire CW3 9LW (GB) (74) Representative: Sales, Robert Reginald  Swindell & Pearson, 48 Friar Gate Derby DE1 1GY Derby DE1 1GY (GB)