Embossed document protection methods and products
US5722693A · kind A · utility
39Cited by
20References
18Claims
0Family size
Inventor
Key dates
| Filing date | Oct 3, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Oct 3, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D2035/16
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method and product for making counterfeit resistant security document. The document has a first set of printed lines which form a latent image and a second set of printed lines at an angle relative to the first set which forms a background image. One of the sets of lines is embossed so as to render the latent image visible only when viewed from pre-determined non-perpendicular angles relative to said document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.