Optical information recording medium
US5210738A · kind A · utility
78Cited by
2References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 11, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Apr 11, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information recording medium, such as an optical disk, includes a meandering guide groove being varied in period according to first additional information and in amplitude according to second additional information. The optical information recording medium enables recording a plurality of kinds of information in addition to the first and second additional information in accordance with a multiple recording system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.