Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874188 | Fiduciary or security object enabling visual or optical authentification | Philippe Gravisse, Maurice Perron | 1989-10-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874188 | Fiduciary or security object enabling visual or optical authentification | Philippe Gravisse, Maurice Perron | 1989-10-17 |