Security element comprising magnetic areas of different coercivities, a method for its production and a method for reading information encoded in the element
US8584948B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 2009 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Apr 1, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/16
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A security element, particularly for banknotes, security cards and the like, comprising a first substrate which is at least partially opaque when viewed in transmitted light, and a plurality of magnetic areas being arranged on the substrate, wherein each of the magnetic areas is formed by a first magnetic material, a second magnetic material or an arrangement of the first and the second magnetic materials being at least partially superimposed, the first magnetic material and the second magnetic material exhibiting different coercivity values which are detectable by a sensor, wherein the first and second magnetic materials are magnetically saturated such that one of the first and second magnetic materials is not affected by the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.