Copyright protection for photos and documents using magnetic elements
US5717381A · kind A · utility
8Cited by
13References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1995 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Dec 21, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2474
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A copyright protection system is provided in which copyrighted articles, such as documents and photos, have associated with the article magnetic material which is detected when the article is copied on a scanner/reproducing machine. The magnetic material may be secured to the article so that it cannot be removed without destroying the article, or the magnetic material may form part of the article. The scanner/reproducing machine is provided with a magnetic detection system for automatically detecting the copyrighted article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.