Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887891 | Zoom lens system for use in microfilm projection apparatus | — | 1989-12-19 |
| 4865431 | Zoom lens system for use in an image projecting apparatus with Kohler illumination | — | 1989-09-12 |
| 4838667 | Zoom lens system for use in microfilm projection apparatus | — | 1989-06-13 |
| 4824236 | Zoom lens system for use in microfilm projection apparatus | — | 1989-04-25 |
| 4805999 | Variable magnification lens system with constant object-image distance | Kunihiko Konoma | 1989-02-21 |