System for embedded digital data that allows embedding of data around known obstructions
US6641051B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1999 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Sep 24, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A system for printing glyph frames around known obstructions. All frames in an area are determined to be obstructed or unobstructed, based on their location with respect to other printed areas. The unobstructed locations can be numbered and glyph data printed within. In the alternative, the good locations can be numbered modulo some number much smaller that the number of available locations to provide redundancy. The unobstructed locations can be stored in either the sync lines or in the data area of other locations known to be unobstructed. Also, the frame itself can be identified as obstructed or unobstructed to provide more redundancy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.