Method to deter document and intellectual property piracy through individualization
US5699427A · kind A · utility
171Cited by
8References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1995 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Jun 23, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3278
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for identifying the authorized receiver of any particular copy of a document. More specifically, each particular copy of a document is fingerprinted by applying a set of variations to a document, where each variation is a change in data contents, but does not change the meaning or perusal experience of the document. A database associating a set of variants to a receiver is maintained. Thus any variant or copy of that variant can be traced to an authorized receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.