Marker for an article which is detected when it passes through a surveillance zone
US5767772A · kind A · utility
23Cited by
14References
10Claims
0Family size
Inventors
Key dates
| Filing date | Aug 8, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Aug 8, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2448
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A security device to monitor object displacement and unauthorized removal from an enclosure. A two-layer adhesive is supplied on the marker, the first stronger adhesive for affixing the marker on the object, a second, weaker adhesive with lower tear resistance than the first which modifies an electrical, chemical, or electrochemical feature for detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.