(19)

(11)

EP 0 221 100 A1

(12)

(43) Date of publication: 13.05.1987 Bulletin 1987/20 (21) Application number: 86902468.0 (22) Date of filing: 29.03.1986

(51) International Patent Classification (IPC):  H04R 25/ 00( . ) H04R 25/ 02( . ) (86) International application number: PCT/IT1986/000028 (87) International publication number: WO 1986/006919 (20.11.1986 Gazette 1986/25)

(84) Designated Contracting States: AT BE CH DE FR GB LI NL SE (30) Priority: 09.05.1985 IT 19850048067 (71) Applicant: COS.EL.GI. S.p.A. I-00040 Pomezia (Roma) (IT)	(72) Inventor: GIANNETTI, Vittorio I-00181 Roma (IT) (74) Representative: Massari, Marcello  Studio M. Massari S.r.l. 23, Via Fontanella Borghese I-00186 Roma I-00186 Roma (IT)