Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9768981 | Tunnel management device, communication control device, and tunnel management method | Satoshi Imai, Ryotaro Matsushita | 2017-09-19 |
| 7657181 | Optical add/drop multiplexer and optical network system | Goji Nakagawa | 2010-02-02 |
| 6671469 | Supervisory apparatus for transmission lines | Takashi Fukagawa, Satoshi Kumano, Katsuhiro Oki, Takatsugu Kurokawa | 2003-12-30 |