Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698988 | Method and device of detecting a deterioration | Yoshiyuki Sakamoto, Koji Yokota | 1997-12-16 |
| 5627920 | Optical-optical modulators | Naohiko Kato, Tadashi Ichikawa, Hiroshi Ito, Tatsumi Hioki | 1997-05-06 |