Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7586672 | Optical transmission system | Eiji Ishikawa, Hiroyuki Deguchi | 2009-09-08 |
| 7349150 | Optical terminal apparatus | Tsukasa Takahashi | 2008-03-25 |
| 7251072 | Optical transmission system | Toshihiro Ohtani, Tsukasa Takahashi, Eiji Ishikawa, Hiroyuki Deguchi | 2007-07-31 |