Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4291945 | Pentagonal roof prism for viewfinder | — | 1981-09-29 |
| 4252424 | Focusing optical system for single-lens reflex cameras | Toshihiro Imai | 1981-02-24 |
| 4223989 | Focusing optical system for single-lens reflex cameras | — | 1980-09-23 |