Multilayered structures and uses thereof in security markings
US12059830B2 · kind B2 · utility
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2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2022 |
| Grant date | Aug 13, 2024 |
| Priority date | — |
| Expiry date | Oct 19, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/387
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A security marking has a physically unclonable function (PUF) wherein the PUF includes a disordered multilayer photonic crystal structure having an electromagnetic transmission and/or reflection spectrum and/or spectra upon receipt of electromagnetic radiation within a photonic bandgap region of the structure that is unique to the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.