Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5623370 | Gradient index lens system | Toshihiko Ueda, Satoshi Iwasaki, Sanae Watanabe, Kazuharu Kagoshima | 1997-04-22 |
| 5602680 | Finite conjugate distance zoom lens system | — | 1997-02-11 |