Issued Patents All Time
Showing 51–52 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5272564 | Zoom lens of internal focusing system | Yoshinari Hamanishi | 1993-12-21 |
| 5253112 | Rear conversion lens | Yoshinari Hamanishi | 1993-10-12 |
Showing 51–52 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5272564 | Zoom lens of internal focusing system | Yoshinari Hamanishi | 1993-12-21 |
| 5253112 | Rear conversion lens | Yoshinari Hamanishi | 1993-10-12 |