Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5668673 | Catadioptric reduction projection optical system | Yutaka Suenaga, Toshiro Ishiyama, Kiyoshi Hayashi | 1997-09-16 |
| 5626641 | Method of manufacturing a glass blank used for optical glass elements | Tadayoshi Yonemoto, Takashi Inoue, Toshihiko Muroi | 1997-05-06 |