Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5702585 | Process of preparing alkali peroxide solutions | Eilhard Hillrichs, Manfred Kienberger | 1997-12-30 |
| 5612816 | Endoscopic attachment for a stereoscopic viewing system | Fritz Strahle, Uwe Vry | 1997-03-18 |