(19)

(11)

EP 1 203 359 A2

(12)

(88) Date of publication A3: 01.03.2001 (43) Date of publication: 08.05.2002 Bulletin 2002/19 (21) Application number: 00964880.9 (22) Date of filing: 25.05.2000

(51) International Patent Classification (IPC)7: G08B 1/00 (86) International application number: PCT/US0014/509 (87) International publication number: WO 0075/892 (14.12.2000 Gazette 2000/50)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 25.05.1999 US 318196 02.07.1999 US 346857 (71) Applicant: Safe Zone Systems, Inc. Albuquerque, MN 87107 (US)	(72) Inventors: CHADWICK, George, G. Menlo Park, CA 94025 (US) WEAKLEY, Thomas, C. Los Gatos, CA 95032 (US) (74) Representative: Kupecz, Arpad et al Octrooibureau Los en Stigter B.V.Postbox 20052 1000 HB Amsterdam 1000 HB Amsterdam (NL)