(19)

(11)

EP 1 101 080 A1

(12)

(43) Date of publication: 23.05.2001 Bulletin 2001/21 (21) Application number: 99935995.3 (22) Date of filing: 30.07.1999

(51) International Patent Classification (IPC)7: G01F 11/00 (86) International application number: PCT/US9917/280 (87) International publication number: WO 0006/976 (10.02.2000 Gazette 2000/06)

(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: 31.07.1998 US 94830 P 31.07.1998 US 94831 P 31.07.1998 US 94896 P (71) Applicants: Neas, Edwin D. Fort Collins, CO 80524 (US) Templar, Dennis L. Fort Collins, CO 80528 (US)	(72) Inventors: Neas, Edwin D. Fort Collins, CO 80524 (US) Templar, Dennis L. Fort Collins, CO 80528 (US) (74) Representative: Jackson, Richard Eric  Carpmaels & Ransford,43 Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)