Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5332700 | High dispersion optical glass | Katsuhiko Yamaguchi, Futoshi Ishizaki, Naoyuki Goto, Hisao Yatsuda, Hideo Yasui | 1994-07-26 |
| 5320985 | Low refractive optical glass of a flint glass type | — | 1994-06-14 |