(19)

(11)

EP 1 076 992 A1

(12)

(43) Date of publication: 21.02.2001 Bulletin 2001/08 (21) Application number: 99918162.1 (22) Date of filing: 23.04.1999

(51) International Patent Classification (IPC)7: H04N 1/60, G01N 21/59 (86) International application number: PCT/GB9901/256 (87) International publication number: WO 9956/462 (04.11.1999 Gazette 1999/44)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 28.04.1998 GB 9808968 (71) Applicant: Howell, Michael John Glasgow G42 8BY (GB)	(72) Inventor: Howell, Michael John Glasgow G42 8BY (GB) (74) Representative: Pacitti, Pierpaolo A.M.E. et al Murgitroyd and Company373 Scotland Street Glasgow G5 8QA Glasgow G5 8QA (GB)