(19)
(11) EP 1 226 455 A2

(12)

(88) Date of publication A3:
09.08.2001

(43) Date of publication:
31.07.2002 Bulletin 2002/31

(21) Application number: 00975208.0

(22) Date of filing: 25.09.2000
(51) International Patent Classification (IPC)7G01S 13/00
(86) International application number:
PCT/US0026/392
(87) International publication number:
WO 0122/118 (29.03.2001 Gazette 2001/13)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR LI
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 24.09.1999 US 406091
24.09.1999 US 406092
24.09.1999 US 405358
24.09.1999 US 405364

(71) Applicant: Interlogix, Inc.
Boca Raton, FL 33487 (US)

(72) Inventor:
  • SEAL, James, G.
    Boca Raton, FL 33498 (US)

(74) Representative: Duhme, Torsten et al
Witte, Weller & Partner,Patentanwälte,Postfach 10 54 62
70047 Stuttgart
70047 Stuttgart (DE)

   


(54) SYSTEM AND METHOD FOR LOCATING RADIO FREQUENCY IDENTIFICATION TAGS USING THREE-PHASE ANTENNA