Information signal recording medium of rotary type with overlapped tracks
US4327430A · kind A · utility
9Cited by
11References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1979 |
| Grant date | Apr 27, 1982 |
| Priority date | — |
| Expiry date | Jul 6, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/36
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information signal recording medium of rotary type has a flat surface with successions of pits formed therein as respective concavities in response to an information signal. The successions of pits constitute respective circular tracks of a specific pitch. Each it is formed with a width, equal to the width of a track, which is substantially equal to or greater than said pitch of the track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.