Method for recording and reproducing information using at least two energy beams
US5404348A · kind A · utility
7Cited by
12References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1990 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Dec 26, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10517
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to the present invention, a so-called overwrite operation which records new information while erasing existing information can be reliably performed in an information storage system such as optical disk system. In addition, whether the rewriting of recording has been properly done can be verified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.