Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870411 | Coded locking device, more especially with keyboard | Claude Hennion | 1989-09-26 |
| 4864141 | Smoke detector with ionization chamber | — | 1989-09-05 |
| 4857913 | Coded objects identifiable by proximity and devices for changing the codes of these objects | Claude Hennion, Didier Leonard | 1989-08-15 |
| 4825462 | Devices for delivering information on their communications to subscribers of telephone lines | Dominique Taudin, Eric Carreel | 1989-04-25 |