Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862158 | Extension arrangement and station connecting method for a ring communication system | Johann Mueller | 1989-08-29 |
| 4798960 | Device for the treatment of substances by UV radiation | Martin Lehner, Reinhard Born, Hans-Georg Lotz | 1989-01-17 |