Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5633758 | Variable magnification lens system | — | 1997-05-27 |
| 5623370 | Gradient index lens system | Satoshi Iwasaki, Sanae Watanabe, Kazuharu Kagoshima, Keijiro Sakamoto | 1997-04-22 |
| 5600489 | Copying zoom lens system | Hiroki Kinoshita | 1997-02-04 |