Variable guilloche and method
US8289579B2 · kind B2 · utility
4Cited by
16References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2007 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Mar 21, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/29
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A variable guilloche includes at least two guilloche curves, printed in a common space and having at least one point of overlap. The at least two curves are plotted from equations having variables corresponding to a specified data string of steganographic information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.