(19)

(11)

EP 0 840 993 A1

(12)

(43) Date of publication: 13.05.1998 Bulletin 1998/20 (21) Application number: 96924240.0 (22) Date of filing: 22.07.1996

(51) International Patent Classification (IPC):  H05H 1/ 02( . ) (86) International application number: PCT/SE1996/000966 (87) International publication number: WO 1997/004626 (06.02.1997 Gazette 1997/07)

(84) Designated Contracting States: CH DE FR GB IE IT LI NL SE (30) Priority: 21.07.1995 GB 19950015039 (71) Applicant: BERGSTRÖM, Arne 112 65 Stockholm (SE)	(72) Inventor: BERGSTRÖM, Arne 112 65 Stockholm (SE) (74) Representative: Quest, Barry, et al  Wilson, Gunn, M'Caw, 41-51 Royal Exchange, Cross Street Manchester M2 7BD Manchester M2 7BD (GB)