Recording medium
US8792319B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 29, 2013 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | May 29, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording medium is provided with: a guide layer on which a guide track or guide tracks are formed; and recording layers, wherein (i) an information mark group and (ii) a distinctive mark group are formed in the guide layer, the information mark group being formed on each of a plurality of guide tracks, the distinctive mark group distinguishing a center track out of the plurality of guide tracks on each of which the information mark group is formed, the distinctive mark group including a pair of distinctive record marks which are shifted toward a right side and a left side, respectively, from a track center of the center track, a width of each distinctive record mark is twice or more a width of the guide track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.