Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6236452 | Optical amplifier evaluation method and optical amplifier evaluation device | Hiroshi Goto, Yukio Tsuda | 2001-05-22 |
| 4758086 | Apparatus for measuring spectral power of a light beam | Seiichi Ishigaki, Tomoyuki Kikugawa | 1988-07-19 |
| 4643572 | Driving circuit of a grating | Youichi Tamura, Kenichiro Umesaki | 1987-02-17 |