Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk
US6160888A · kind A · utility
14Cited by
25References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1999 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Nov 16, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Data is recorded on an optical disk. In a prescribed region of the disk, an identifier is provided for indicating whether a barcode-like mark is present or not on the disk. The identifier and the barcode-mark are in different locations on the disk. A control area, in which physical feature information regarding the disk is recorded, is included in the prescribed region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.