(19)

(11)

EP 1 034 414 A1

(12)

(43) Date of publication: 13.09.2000 Bulletin 2000/37 (21) Application number: 98959355.3 (22) Date of filing: 25.11.1998

(51) International Patent Classification (IPC)7: G01G 9/00, G01G 17/04, G01G 17/06, G01G 21/22, G01G 23/18 (86) International application number: PCT/SG9800/095 (87) International publication number: WO 9927/330 (03.06.1999 Gazette 1999/22)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE (30) Priority: 25.11.1997 SG 9704136 (71) Applicant: Chong, Choon Loong Singapore 520121 (SG)	(72) Inventor: Chong, Choon Loong Singapore 520121 (SG) (74) Representative: Powell, Timothy John  Eric Potter Clarkson,Park View House,58 The Ropewalk Nottingham NG1 5DD Nottingham NG1 5DD (GB)