Electronic article surveillance system with enhanced geometric arrangement
US5459451A · kind A · utility
29Cited by
11References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1994 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Mar 11, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/29
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electronic article surveillance system for detecting articles carrying or containing magnetically responsive markers is disclosed, which system comprises a transmitting antenna in the form of a large loop of current-carrying material through which the articles are passed, and one or more receiving antenna units, which detect the electromagnetic response of the markers to an interrogating electromagnetic field generated by the transmitting antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.