Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6556749 | Array waveguide grating and method of manufacture thereof | Hisato Uetsuka, Masahiro Okawa, Takafumi Chiba | 2003-04-29 |
| 6549696 | Optical wavelength multiplexer/demultiplexer | Hisato Uetsuka, Masahiro Okawa, Hideki Nounen, Tatsuo Teraoka | 2003-04-15 |
| 6317534 | Optical wavelength routing device | Tetsuya Miyazaki, Shu Yamamoto, Hisato Uetsuka | 2001-11-13 |
| 6069990 | Optical wavelength multiplexer/demultiplexer | Masahiro Okawa, Hisato Uetsuka, Hideaki Arai | 2000-05-30 |