Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8897638 | Optical packet switching system | Satoshi Fukutomi, Wataru Kawasaki | 2014-11-25 |
| 8190036 | Optical signal receiving apparatus and optical signal attenuation controlling method | Sunao Itou, Hideyuki Kikuchi | 2012-05-29 |
| 7577873 | Transmission apparatus | Wataru Kawasaki | 2009-08-18 |