Anti-counterfeiting opto-thermal watermark for electronics
US9296246B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2013 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Jun 10, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1324
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An anti-counterfeiting technique presents, to a test thermoreflective mark at a first temperature, a first electromagnetic wave. A first test reflective profile for the test thermoreflective mark associated with the first temperature is recorded. A second electromagnetic wave is presented to the test thermoreflective mark at a second temperature. A second test reflective profile for the test thermoreflective mark associated with the second temperature is recorded. The first test reflective profile is compared with a first control reflective profile that is associated with a genuine thermoreflective mark. The second test reflective profile is compared with a second control reflective profile that is associated with the genuine thermoreflective mark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.