Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4671622 | Zoom lens mount | — | 1987-06-09 |
| 4415250 | Focusing system for long focal length objectives | Volker Donn, Christian Ludwig | 1983-11-15 |
| 4405205 | Adjustable mechanism for a photo objective | — | 1983-09-20 |
| 4319824 | Rebound damping means for fast-closing photographic diaphragms | — | 1982-03-16 |