Sheet for data codes and method of recognizing these codes
US5984189A · kind A · utility
5Cited by
12References
23Claims
0Family size
Inventor
Key dates
| Filing date | Jan 10, 1994 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Jan 10, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/06037
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data code having at least one unit, each unit being divided into at least two regions having similar dimensions. Selected regions of each unit are shaded to represent a unique value. Each unit has a unique arrangement of shaded regions to represent a particular characteristic whereby the data code may represent a decimal, a hexidecimal or a binary notation. This code does not require accurate printing, thereby enabling a user to read the code directly. A code sensor is used for reading the code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.