Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11945256 | Laser marked optically variable device | Thivaharan Thurailingam | 2024-04-02 |
| 9530172 | Encoding hidden information in spatial line frequencies | Marc Gaudreau, Tadeusz Rygas | 2016-12-27 |
| 8846778 | Method and composition for printing tactile marks and security document formed therefrom | Tadeusz Rygas, Thivaharan Thurailingam, Norbert Joseph Sylvain Chalifoux | 2014-09-30 |