(19)

(11)

EP 1 141 659 A1

(12)

(43) Date of publication: 10.10.2001 Bulletin 2001/41 (21) Application number: 99959522.6 (22) Date of filing: 06.12.1999

(51) International Patent Classification (IPC)7: G01D 4/00, G08C 17/02, G01F 15/00, G01F 15/06 (86) International application number: PCT/GB9904/101 (87) International publication number: WO 0034/745 (15.06.2000 Gazette 2000/24)

(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: 10.12.1998 GB 9827147 (71) Applicant: Lattice Intellectual Property Limited London SW1Y 4UR (GB)	(72) Inventors: Ullathorne, David Chilwell,Nottingham NG6 5BT (GB) Tailor, Chandra Loughborough,Leicestershire LE11 3LF (GB) Maclean, Mark James East Hunsbury,Northampton NN4 0SF (GB) (74) Representative: Illingworth-Law, William  Lattice Intellectual Property Ltd23 Buckingham Gate London SW1E 6LB London SW1E 6LB (GB)