(19)

(11)

EP 1 058 919 A1

(12)

(43) Date of publication: 13.12.2000 Bulletin 2000/50 (21) Application number: 99910954.9 (22) Date of filing: 16.02.1999

(51) International Patent Classification (IPC)7: G08B 15/02 (86) International application number: PCT/US9903/214 (87) International publication number: WO 9945/514 (10.09.1999 Gazette 1999/36)

(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: 03.03.1998 US 33576 (71) Applicant: Tracking Technologies, Inc. Spring Lake Park, MN 55432 (US)	(72) Inventors: HUNT, Daniel, Robert Moundsview, MN 55112 (US) GROSSO, Paul Eden Prairie, MN 55346 (US) (74) Representative: Portal, Gérard et al Cabinet Beau de Loménie158, rue de l'Université 75340 Paris Cédex 07 75340 Paris Cédex 07 (FR)