Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8199639 | Path protection method and layer-2 switch | Ko Takatori, Kenichi Kawarai | 2012-06-12 |
| 7957267 | Fault detection device | Yasushi Sasagawa, Kenichi Kawarai, Kou Takatori | 2011-06-07 |
| 7860031 | Apparatus and method for processing control packet in spanning tree protocol | Yasushi Sasagawa, Kou Takatori | 2010-12-28 |
| 7633889 | Carrier network of virtual network system and communication node of carrier network | Atsuko Higashitaniguchi, Hiroshi Kinoshita, Satsuki Norimatsu | 2009-12-15 |
| 7590048 | Restoration and protection method and an apparatus thereof | — | 2009-09-15 |
| 7120357 | WDM device, client device, network, system and method for allocating wavelength of WDM to a client signal | — | 2006-10-10 |