Multi-layer polymeric film and the use thereof
US7044396B2 · kind B2 · utility
2Cited by
3References
53Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2001 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | May 26, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K1/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The use of a multilayer film to store or retrieve information, said information being correlated to the multilayer structure of the film, and said multilayer film comprising at least two different types of layer, wherein each type of layer exhibits a different optical property and wherein the multilayer film comprises a plurality of layers of each of at least two of the different types of layer; a method of storing information, a method of retrieving stored information and a method of protecting against counterfeiting or fraud, which method utilizes said multilayer film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.