Information recording disc and system
US5323380A · kind A · utility
26Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1991 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Jul 2, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/211
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording disc having at least two bands of information provided thereon. Each of the bands contain at least one track with one of the at least two bands being a read-only area band or a write area band along the one track of the one band. Another of the at least two bands is a mixed area band having at least one read-only area and at least one write area at different portions along the track of the mixed area band. An information system utilizes the disc for writing and reading information to and from the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.