Recording media, recording and reproducing apparatus, and method for recording and reproducing
US7623311B2 · kind B2 · utility
1Cited by
30References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2006 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Dec 1, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2525
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording layer is formed on a surface of a substrate in magnetic recording media to define magnetic recording regions. Magnetic missing portions are provided in the magnetic recording regions, information cannot be magnetically recorded in the magnetic missing portions. The present invention provides magnetic recording media that enables authentication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.