Self-contained device for recording data encoded either in visible or invisible form
US5995193A · kind A · utility
108Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | May 1, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A self-contained device for recording data encoded either in visible or invisible form or both on a medium, and for playback of data encoded either in visible or invisible form or both on the medium, the device comprises a case for forming a self-contained housing for the device; a recording portion for recording either or both visible and invisible ink on the medium, or recording either or both visible and invisible dye; and a detecting portion for detecting either or both visible and invisible ink, or detecting either or both visible and invisible dye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.