Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6657952 | Ring network for sharing protection resource by working communication paths | Tatsuya Shiragaki, Naoya Henmi, Makoto Nishio, Hitoshi Takeshita | 2003-12-02 |
| 6538779 | Optical signal monitoring method and apparatus | Hitoshi Takeshita, Tatsuya Shiragaki, Naoya Henmi | 2003-03-25 |