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(11)

EP 1 166 126 A1

(12)

(43) Date of publication: 02.01.2002 Bulletin 2002/01 (21) Application number: 00925898.9 (22) Date of filing: 07.04.2000

(51) International Patent Classification (IPC)7: G01P 13/00, G08B 26/00 (86) International application number: PCT/US0009/262 (87) International publication number: WO 0062/081 (19.10.2000 Gazette 2000/42)

(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: 08.04.1999 US 128368 P (71) Applicant: Interactive Technologies, Inc. St. Paul, MN 55109 (US)	(72) Inventors: SEEMANN, Brian Lakeville, MN 55044 (US) CHRISTIANSON, Joel, C. Maple Grove, MN 55369 (US) KREIER, James Amery, WI 54001 (US) BERGMAN, John, T. River Falls, WI 54022 (US) (74) Representative: Gassner, Wolfgang, Dr. et al Patentanwalt Nägelsbachstrasse 49a 91052 Erlangen 91052 Erlangen (DE)