Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7609728 | Optical transmission switching device | Toshiaki Arikawa, Shigekazu Harada, Hajima Ishikawa, Takahide Sugita, Hidetoshi Shinoda | 2009-10-27 |
| 7372804 | Multiplex communication system and method | Toshiaki Arikawa, Shigekazu Harada, Hajime Ishikawa, Takahide Sugita, Hidetoshi Shinoda | 2008-05-13 |