Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4568824 | Forgery-proof information carrier | Raimo Gareis | 1986-02-04 |
| 4536015 | Forgery-proof information carrier | — | 1985-08-20 |
| 4371196 | Security filament as protection against fraud | Walter von Kempski | 1983-02-01 |