Multiple resolution machine readable symbols
US5153418A · kind A · utility
124Cited by
31References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1990 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Oct 30, 2010 |
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 more optical resolutions, and is able to store two or more respective channels of optically encoded 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.