Information recording/reproducing apparatus
US4958314A · kind A · utility
30Cited by
12References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1987 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Feb 11, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2537
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording/reproducing apparatus for an information storage medium comprising sectors each having a data area composed of a read-only data area and a writable data area. Data in the read-only data area are formed through pressing or the like, and when the data in the read-only data area are to be renewed, renewed data are recorded in the writable data area so that it is made possible to form a large quantity of correctable read-only data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.