Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7885181 | Ring node apparatus | Toshihiro Ban, Takashi Fukagawa, Masanori Kondo, Yasushi Nishine | 2011-02-08 |
| 7206512 | Method of controlling optical wavelength division multiplexing transmission apparatus | Akihisa Kawaguchi, Eisaku Touma | 2007-04-17 |
| 6839518 | Level adjustment method and wavelength division multiplexing device and system | Akihisa Kawaguchi | 2005-01-04 |
| 6317843 | Erroneous package mounting determination method for a transmission device, and a transmission device using the same | Jun Shimada | 2001-11-13 |