Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4944170 | Device for lifting a time ban on the actuation of a mechanism in a conditional-opening locking system in the event of a breakdown | Willy Richard | 1990-07-31 |
| 4821541 | Time lock | Willy Richard | 1989-04-18 |
| 4774512 | Arrangement for removing a conditional ban on the operation of a lock | Willy Richard | 1988-09-27 |