Method and apparatus for generating images of magnetic fields in at least two dimensions
US7090130B2 · kind B2 · utility
9Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2002 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Oct 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/087
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and Methods for imaging magnetic fields and for using images of magnetic fields in the authentication of magnetic stripe cards or documents are disclosed. The systems described provide an increased tolerance for misalignments of magnetic reading heads. One preferred embodiment of the invention includes sensing circuitry for sensing an image of the magnetic field using an array of magnetic reading heads and sampling circuitry connected to the sensing circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.