Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9800326 | Optical transmission device and protection wavelength selection method | Takashi Honda, Masashige Kawarai, Satoru Saitoh | 2017-10-24 |
| 9379839 | Optical transmission device and optical transmission method | Ichiro Nakajima | 2016-06-28 |
| 8554071 | Optical transmission apparatus and continuity testing method | Ichiro Nakajima | 2013-10-08 |
| 8190022 | Optical transmission apparatus | — | 2012-05-29 |