Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5020893 | Biconvex rod lens | Siegfried Karst, Rolf Zickwolf | 1991-06-04 |
| 4815833 | Objective for endoscopes and process for its production | Jurgen Zobel, Siegfried Karst, Rolf Zickwolf | 1989-03-28 |