Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6643041 | Optical network | Tatsuo Kanetake | 2003-11-04 |
| 6625115 | Self-healing network, method for transmission line switching thereof, and transmission equipment thereof | Toshiki Sugawara, Yukio Nakano | 2003-09-23 |