Security material and secure document system using said material
US4180207A · kind A · utility
34Cited by
9References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1977 |
| Grant date | Dec 25, 1979 |
| Priority date | — |
| Expiry date | Dec 9, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D2035/50
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A secure document is produced by securely attaching to a support a body of including a security feature and having a shape which conveys information to the eye. For example the body is a layer of magnetizable material having apertures of letters, numbers and the like. The document can be examined by both magnetic and optical examination apparatus to cross-check that no alteration has been made. A method of making a secure document and examination apparatus is also described. The security feature may be a pattern of magnetic anisotropy fixed into the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.