Optical information recording/reproducing system, optical information storage medium, and manufacturing method thereof
US5930217A · kind A · utility
127Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1998 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Nov 9, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information storage medium is provided which may be employed as a prepaid card usable as money in limited stores. The optical information storage medium includes a function writable chip which consists of a plurality of memory areas each including a writable region in which information can be written once by a scan of a given beam of light and a read-only region storing therein given information which can be read out by a scan of a given beam of light. Each of the read-only regions includes a scanning guide section and an address storage section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.