Coding systems
US6390368B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Mar 13, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7156
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Machine readable coded markings carried on articles to identify various properties of the articles are disclosed. The coded markings are formed integrally of the article in the form of a sequence of areas having contrasting light scattering and reflecting properties incorporated on the article's surface. The areas are arranged in the form of neighboring blocks and empty spaces disposed around and outside of a central target area defined by a sequence of concentric continuous markings, the blocks forming a series of layers containing coded information. Each of the blocks is positioned side-by-side contiguous either with the outermost ring of the target or with a block in a previous layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.