Three-dimensional authentication of microparticle mark
US7831042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2007 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | Mar 13, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F3/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system, method, and apparatus for authenticating microparticle marks or marks including other three-dimensional objects. The authentication utilizes two or more sets of information captured or acquired for the mark in response to illumination of the mark by electromagnetic energy such as in the visible frequency range. These sets of information are then used to verify that the mark includes three-dimensional objects such as microparticles. The two or more sets of information about the mark preferably vary from each other in time, space/directionality, color, frequency or any combinations thereof, and can be captured or acquired as part of one, two, or more images of the microparticle mark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.