Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9332326 | Optical transmission device and monitoring method of optical signal | Akihiro Mukai, Hiroki Takaki, Ichiro Nakajima, Yoshinobu Matsukawa | 2016-05-03 |
| 8374500 | SONET/SDH transmission apparatus | Yoshinobu Matsukawa, Hiroshi Yoshida, Yasuhiro Fuchi, Masanori Eiro | 2013-02-12 |