Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8837939 | Wavelength division multiplexing transmission system, optical channel monitor and optical channel monitoring method | Takefumi Oguma | 2014-09-16 |
| 8638673 | Communication path monitoring method and transmission apparatus | — | 2014-01-28 |
| 8285145 | Modular colorless and directionless multi-degree reconfigurable optical add/drop multiplexer node with in-service upgradeability | Philip Nan Ji, Yoshiaki Aono, Ting Wang | 2012-10-09 |
| 8244123 | System and method for optical transmission | — | 2012-08-14 |