Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5469727 | Electronic lock cylinder | Karl-Heinz Spahn, Franz Schwerdt | 1995-11-28 |
| 5373718 | Electronic lock cylinder connectable by a plug connector | Franz Schwerdt, Thomas Wondrak, Karl-Heinz Spahn, Dieter Wienert | 1994-12-20 |