Magnetic metallic safeguarding thread with negative writing
US5354099A · kind A · utility
39Cited by
9References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1992 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Sep 30, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/915
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The invention relates to a security document, in particular a bank note, identity card or the like having a security element which is provided with characters, patterns, etc., visually readable at least in transmitted light and which is electrically conductive and bears additional substances for machine testing, and to a method for producing such a security element. The security element comprises a transparent film strip that bears negative writing readily capable of visual checking and is additionally provided with electrically conductive and magnetic substances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.