Method for embedding non-intrusive encoded data in printed matter
US6354630B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1999 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Aug 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/004
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method for encoding, on an imprintable medium, identification information for identifying the imprintable medium in a manner detectable by a print-monitoring system includes the steps of defining an identification pattern. The identification pattern is imprinted on a print control region so as to be relatively inconspicuous to an unaided human reviewer of the printed matter while remaining detectable to a print monitoring system. The method includes the step of imprinting, at a plurality of locations in the print control region, a plurality of bit characters detectable by the print control system. The spatial distribution of the bit characters encodes information about the identity of the document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.