EP 0388609 A3 19910320 - ELECTRONIC ANTIPILFERAGE DEVICE AND METHOD FOR THE OPERATION OF SUCH A DEVICE
Title (en)
ELECTRONIC ANTIPILFERAGE DEVICE AND METHOD FOR THE OPERATION OF SUCH A DEVICE
Publication
Application
Priority
CH 107889 A 19890322
Abstract (en)
[origin: EP0388609A2] The antipilferage or surveillance device with a transmitter and a receiver for signals of a resonance label located where appropriate in the receiver range is designed so that the transmitter transmits or does not transmit periodically during alternating time phases only, and the receiver evaluates only the signals received where appropriate during the relevant transmission pauses in order to activate an alarm.
IPC 1-7
IPC 8 full level
G08B 13/24 (2006.01); H04B 7/26 (2006.01)
CPC (source: EP)
G08B 13/2414 (2013.01); G08B 13/2471 (2013.01); G08B 13/2488 (2013.01)
Citation (search report)
- [X] FR 2515362 A1 19830429 - KNOGO CORP [US]
- [X] US 4215342 A 19800729 - HOROWITZ PETER [US]
- [X] US 3740742 A 19730619 - THOMPSON T, et al
- [A] US 4686517 A 19870811 - FOCKENS TALLIENCO W H [NL]
- [A] EP 0131440 A1 19850116 - MINNESOTA MINING & MFG [US]
- [A] EP 0226402 A2 19870624 - MINNESOTA MINING & MFG
Designated contracting state (EPC)
BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
EP 0388609 A2 19900926; EP 0388609 A3 19910320; EP 0388609 B1 19971229; CH 681051 A5 19921231; DE 59010785 D1 19980205; JP H02284294 A 19901121
DOCDB simple family (application)
EP 90102051 A 19900202; CH 107889 A 19890322; DE 59010785 T 19900202; JP 6992190 A 19900322