Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6643422 | Optical switch changeover controlling method, optical node device and optical switch system | Toru Katagiri, Satoshi Kuroyanagi, Ichiro Nakajima, Takuji Maeda | 2003-11-04 |