EP 0431343 A3 19920408 - AUDIBLE TAG FOR MAGNETIC ELECTRONIC ARTICLE SURVEILLANCE SYSTEMS
Title (en)
AUDIBLE TAG FOR MAGNETIC ELECTRONIC ARTICLE SURVEILLANCE SYSTEMS
Publication
Application
Priority
US 44632289 A 19891205
Abstract (en)
[origin: EP0431343A2] A tag for use in a magnetic article surveillance system comprising an antenna means responsive to a transmitted magnetic signal and a piezolectric means responsive to the antenna means for generating an audible acoustic signal. <IMAGE>
IPC 1-7
IPC 8 full level
G01V 3/10 (2006.01); G01V 3/00 (2006.01); G01V 15/00 (2006.01); G08B 13/24 (2006.01); G09F 27/00 (2006.01); H04R 17/10 (2006.01)
CPC (source: EP)
G08B 13/2422 (2013.01); G08B 13/2431 (2013.01)
Citation (search report)
[X] US 3755803 A 19730828 - COLE P, et al
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 0431343 A2 19910612; EP 0431343 A3 19920408; AR 247308 A1 19941130; BR 9005420 A 19910917; CA 2020952 A1 19910606; JP H03244099 A 19911030
DOCDB simple family (application)
EP 90121452 A 19901109; AR 31761590 A 19900816; BR 9005420 A 19901026; CA 2020952 A 19900711; JP 32618790 A 19901129