Image forming apparatus with security feature which prevents copying of specific types of documents
US5647010A · kind A · utility
77Cited by
17References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1994 |
| Grant date | Jul 8, 1997 |
| Priority date | — |
| Expiry date | Sep 14, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/902
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a digital copier, facsimile machine, scanner, image filing apparatus or similar apparatus, an image processing device is provided with a capability of surely identifying confidential or secrecy documents which should be protected from unauthorized persons. The confidential or inhibited documents are provided with inhibition patterns by printing or copying over the entire surfaces thereof. The device prevents image data representative of this kind of documents from being improperly copied, transferred, stored or input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.