Method for uniquely marking objects
US11886947B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2021 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | Nov 17, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/80
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for uniquely marking an object, wherein a random distribution of individual pigment domains is applied to a surface of the object, and wherein a list of distances of the individual pigment domains from one another is measured and stored in a database. Also a corresponding method for identifying an object by: capturing an image of the pigment domains, identifying the two-dimensional coordinates of each pigment domain captured in the image, determining the two-dimensional distance of each pair of two pigment domains and/or the angle of each triplet of pigment domains, storing the distances and/or angles determined in the step before in a list, storing the list in the database, the list enriched with meta-information about the manufacturing and/or finishing parameters of the object, applying a database identification as an information unit to the surface of the object, the information unit uniquely assignable to the database.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.