(19)

(11)

EP 0 456 789 A1

(12)

(43) Date of publication: 21.11.1991 Bulletin 1991/47 (21) Application number: 90917488.0 (22) Date of filing: 17.11.1990

(51) International Patent Classification (IPC):  G01F 1/ 84( . ) (86) International application number: PCT/US1990/006728 (87) International publication number: WO 1991/008446 (13.06.1991 Gazette 1991/13)

(84) Designated Contracting States: DE FR GB IT SE (30) Priority: 24.11.1989 US 19890440693 19.01.1990 US 19900467481 (71) Applicant: LEW, Hyok Sang Arvada, CO 80005 (US)	(72) Inventor: LEW, Hyok Sang Arvada, CO 80005 (US) (74) Representative: Baillie, Iain Cameron, et al  c/o Ladas & Parry Altheimer Eck 2 D-80331 München D-80331 München (DE)