Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7952994 | Redundancy method and switch apparatus | — | 2011-05-31 |
| 7283742 | Optical signal judging system and optical signal judging method | — | 2007-10-16 |
| 7206512 | Method of controlling optical wavelength division multiplexing transmission apparatus | Akihisa Kawaguchi, Kazuhiro Minamimoto | 2007-04-17 |
| 7099595 | Optical wavelength multiplexing transmission apparatus and optical output control method for optical wavelength multiplexing transmission apparatus | — | 2006-08-29 |
| 6819875 | Optical wavelength multiplexing transmission apparatus and optical output control method for optical wavelength multiplexing transmission apparatus | — | 2004-11-16 |
| 6288806 | Optical subscriber network system and fault supervising method for optical subscriber network system | Takashi Sakata | 2001-09-11 |
| 6288809 | Optical subscriber network system | Takashi Sakata | 2001-09-11 |
| 6108112 | Method and apparatus for failure recovery in passive optical network | — | 2000-08-22 |