Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9097550 | Navigation device, server, navigation method and program | — | 2015-08-04 |
| 7894127 | Optical transmission system and optical amplification method used in the system | — | 2011-02-22 |
| 7688501 | Optical transmission system and optical amplification method used in the system | — | 2010-03-30 |
| 7123405 | Optical amplifying and relaying system | Takaaki Ogata | 2006-10-17 |
| 6868204 | Optical amplifying and relaying system | Takaaki Ogata | 2005-03-15 |
| 6845192 | Optical amplifying and relaying system | Takaaki Ogata | 2005-01-18 |
| 6704134 | Optical amplifier, optical amplifying repeater and transmission apparatus of wavelength division multiplexed signal light using the same | — | 2004-03-09 |
| 6658211 | Optical signal repeater and output level control method used in this repeater | — | 2003-12-02 |
| 6603587 | Optical amplifier repeater | Shuji Yamashita, Yasuhiro Aoki, Kenichi Yoneyama | 2003-08-05 |
| 6504637 | Optical regeneration circuit for regenerating signal with deteriorated signal to noise ratio by means of saturable absorption element | Satoshi Ishii | 2003-01-07 |