Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5469727 | Electronic lock cylinder | Helmut Aswegen, Franz Schwerdt | 1995-11-28 |
| 5373718 | Electronic lock cylinder connectable by a plug connector | Franz Schwerdt, Thomas Wondrak, Dieter Wienert, Helmut Aswegen | 1994-12-20 |
| 5311757 | Flat key with circuit chip | — | 1994-05-17 |
| 5044184 | Lock | Michael Herbers, Anton Uekotter, Dieter Wienert | 1991-09-03 |