Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5367148 | Counterfeit detection using ID numbers with at least one random portion | Ernst van Haagen | 1994-11-22 |
| 5283422 | Information transfer and use, particularly with respect to counterfeit detection | Ernst van Haagen | 1994-02-01 |