Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874231 | Zoom lens | — | 1989-10-17 |
| 4770511 | Zoom lens capable of accomplishing macro-photography | Yasuo Yonezawa, Tomowaki Takahashi | 1988-09-13 |
| 4765722 | Zoom lens | — | 1988-08-23 |
| 4699475 | Zoom lens including a wide angle of view | Tomowaki Takahashi | 1987-10-13 |
| 4639094 | Gradient index lens system | — | 1987-01-27 |
| 4634237 | Zoom lens | Yasuo Yonezawa | 1987-01-06 |
| 4591244 | Zoom lens | Koichi Matsumoto | 1986-05-27 |