Copy restrictive documents
US6103353A · kind A · utility
14Cited by
12References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Jul 8, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24901
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A media for restricting the copying of a document utilizing one or more microdots that are embedded in said document for providing a non-visual, but machine detectable mark or marks. The detected means for detecting the presence of one or more microdots in said document inhibits a copy machine from copying the document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.