Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8313793 | Method for producing and visualizing an optically hidden mark | — | 2012-11-20 |
| 6905725 | Method for creating and visualizing an optically invisible mark | Alexander M. Dykhne | 2005-06-14 |