Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5373718 | Electronic lock cylinder connectable by a plug connector | Franz Schwerdt, Thomas Wondrak, Karl-Heinz Spahn, Helmut Aswegen | 1994-12-20 |
| 5044184 | Lock | Michael Herbers, Karl-Heinz Spahn, Anton Uekotter | 1991-09-03 |
| 4833465 | Electronic door lock | Klaus Abend, Johannes Filthaut | 1989-05-23 |