Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4825052 | Method and apparatus for certifying services obtained using a portable carrier such as a memory card | Francois Chemin | 1989-04-25 |
| 4807288 | Microprocessor intended particularly for executing the calculation algorithms of a public code encoding system | Louis Guillou | 1989-02-21 |
| 4795893 | Security device prohibiting the function of an electronic data processing unit after a first cutoff of its electrical power | — | 1989-01-03 |