Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5194856 | System for detecting the presence in a rack of a portable unit suitable for transmitting or receiving a signal containing an identification number assigned thereto | — | 1993-03-16 |
| 5164704 | System for transmitting alarm signals with a repetition | Petrus A. J. Steen | 1992-11-17 |