Magnetic keys having a plurality of magnetic plates
US10212300B2 · kind B2 · utility
0Cited by
6References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2016 |
| Grant date | Feb 19, 2019 |
| Priority date | — |
| Expiry date | Dec 9, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Magnetic keys having a plurality of magnetic plates are disclosed. The location and orientation of the magnetic plates are controlled to generate magnetic fields that are of sufficient strength to be reliably read and sufficient complexity to be difficult to counterfeit. The magnetic keys are located on imaging-device supply items along with non-volatile memory devices containing measurements of the magnetic fields that are digitally signed. These supply items are difficult to counterfeit. Other devices are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.