Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8478137 | Optical receiver | Masahiro Shioda, Katsumi Fukumitsu, Osamu Takeuchi | 2013-07-02 |
| 8358939 | Optical communication device | — | 2013-01-22 |
| 7899331 | WDM optical transmission system and optical amplifying apparatus | Hiroyuki Itoh | 2011-03-01 |
| 7880960 | Optical amplifier and abnormality detection method for the same | Yuji Tamura | 2011-02-01 |
| 7756422 | Method for measuring optical characteristics and system thereof | Takeshi Sakamoto, Yuji Shimada, Takuji Maeda | 2010-07-13 |
| 7215464 | Optical amplifier | Hiroyuki Itoh | 2007-05-08 |
| 7202997 | Optical amplifier and optical amplifier control method | Hiroshi Iizuka, Hiroyuki Itou | 2007-04-10 |
| 7145717 | Optical amplifier | Masao Nakata, Yoshio Shimano | 2006-12-05 |
| 7038769 | Characteristic monitoring method of pumping light source for optical amplification and optical amplifier | — | 2006-05-02 |
| 6977770 | Optical amplifier and control method therefor | Hiroyuki Itou, Hiroshi Iizuka | 2005-12-20 |