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(11)

EP 1 599 707 A1

(12)

(43) Date of publication: 30.11.2005 Bulletin 2005/48 (21) Application number: 04714369.8 (22) Date of filing: 25.02.2004

(51) International Patent Classification (IPC)7: G01H 3/10, A61N 7/02 (86) International application number: PCT/GB2004/000736 (87) International publication number: WO 2004/076989 (10.09.2004 Gazette 2004/37)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 25.02.2003 GB 0304281 (71) Applicant: THE SECRETARY OF STATE FOR TRADE AND INDUSTRY London SW1 0ET (GB)	(72) Inventor: SHAW, Adam,National Physical Laboratory Teddington,Middlesex TW11 0LW (GB) (74) Representative: Pingree, Oliver Norman et al Williams Powell, 26-30 Holborn Viaduct London EC1A 2PB London EC1A 2PB (GB)