Dual sensor decoder
US5736722A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1996 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Feb 8, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/084
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A medium having an information pattern encoded as changes in two values of a medium characteristic, including start and end key patterns which have characteristic value changes spaced a fixed distance apart, and including intermediate characteristic value changes, which, with the key patterns, encode information. Two sensors are spaced from each other the fixed distance for sensing the medium characteristic value changes as the medium and the sensors are moved relatively to each other, and for producing signals representative thereof. Circuitry for processing the signals from the sensors to produce an information signal is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.