Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6212003 | Optical amplifier evaluating method and optical amplifier evaluating apparatus | Yukio Tsuda | 2001-04-03 |
| 5960134 | Optical switch capable of detecting switching operation | Hideyuki Sakamoto | 1999-09-28 |
| 5210657 | Optical attenuator apparatus without steep level variation | Fuminobu Ito, Kenichiro Umesaki, Yuuichi Watanabe, Yoshiharu Sasaki | 1993-05-11 |