Method and apparatus for sensitizing and desensitizing targets for electronic article surveillance systems
US5225807A · kind A · utility
21Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1991 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Sep 16, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2411
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Magnetically desensitized targets or sensor elements on protected articles are resensitized by means of rotating permanent magnets which are moved relative to the magnetized target desensitizer elements such that the elements become subjected to reversing magnetic fields of gradually decreasing intensity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.