Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4798948 | Field stop for dark field illumination in autofocus optical device | Hans-Werner Stankewitz | 1989-01-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4798948 | Field stop for dark field illumination in autofocus optical device | Hans-Werner Stankewitz | 1989-01-17 |