Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5375886 | Counterfeit-proof paper for discouraging attempt at reproduction with copying device | — | 1994-12-27 |
| 4944533 | Forging-by-copying-proof prints | — | 1990-07-31 |
| 4780397 | Process for preparing film positive sheets for forging-by-copying-proof prints and prints therefrom | — | 1988-10-25 |