Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5334971 | Security device kit, a security device and a security installation | — | 1994-08-02 |
| 4920331 | Security barrier with intrusion sesning and delaying means | Hendrik M. Ver Loren van Themaat | 1990-04-24 |