System method and apparatus using multiple resolution machine readable symbols
US5223701A · kind A · utility
111Cited by
30References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1992 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Jan 31, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multiple resolution optically encoded label is readable at two or more optical resolutions, and is able to store two or more respective channels of optically encode information. Low resolution information is encoded in a plurality of large cells arranged in a predetermined geometric pattern. Each of the large cells includes a plurality of smaller cells for storing high resolution information. Method and apparatus are disclosed for encoding both high resolution data, and low resolution data, as well as for finding and reading both high resolution and low resolution data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.