Disc serialization
US5572589A · kind A · utility
64Cited by
19References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1993 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Dec 9, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00586
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Several approaches to serializing a disc may be used in the present invention. First, portions of a disc (such as sector(s) or track(s)) may be physically damaged to create a pattern of damage that somewhat uniquely identifies the disc. A number of different techniques may be used to damage the disc. For instance, laser devices may be used, sharp devices may be used or a master disc may be configured to create the damage. The physical damage may be used in conjunction with soft damage that is encoded in software on the disc. Alternatively, certain soft damage approaches may be used separately to serialize the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.