Method and apparatus for controlling access to storage media
US7486790B1 · kind B1 · utility
9Cited by
308References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2000 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Jul 16, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/282
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for controlling access to a storage medium, such as an optically readable medium. Light sensitive or other materials that are adapted to change state and affect reading of a storage medium are used to control access to data that may be stored on optical medium and/or to control use of the medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.