Information-bearing article for conveying information which cannot be surreptitiously detected
US4273362A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1978 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | Apr 21, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/903
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information-bearing article for conveying indicia from one person to a second person in such a way that the information cannot be surreptitiously detected by an intervening person. Thus, the information-bearing means is so constructed that detection thereof necessarily requires some irreparable and detectable disfigurement or mutilation of the information-bearing article. Use of the article in lottery ticket distribution and use in connection with the transfer of highly confidential governmental or business information, are typical applications. The most advantageous construction of the invention combines means to avoid surreptitious detection of the hidden indicia by optical, chemical, thermal and mechanical processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.