Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5710671 | Optical system | — | 1998-01-20 |
| 5506567 | Process for monitoring the openings to an enclosed space | Ferdinand Friedrich, Dieter Grafje, Udo Teubert, Hans-Joachim Fach, Thomas Rupprecht +6 more | 1996-04-09 |