Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11626937 | Optical transmission apparatus and control method of optical transmission apparatus | Yurie MATSUYAMA | 2023-04-11 |
| 11483067 | Optical time domain reflectometer, test method of optical transmission line, and test system of optical transmission line | Yuhei MATSUMOTO, Kazunori Shinya | 2022-10-25 |
| 11476930 | Optical time domain reflectometer, method of testing optical transmission line, and test system of optical transmission line | Yuhei MATSUMOTO, Kazunori Shinya | 2022-10-18 |
| 10659165 | Optical transmission device | Yurie MATSUYAMA | 2020-05-19 |
| 10539741 | Optical device with optical filters and processing method of optical signals | Yurie MATSUYAMA | 2020-01-21 |
| 8879908 | Optical channel monitor | — | 2014-11-04 |
| 8837939 | Wavelength division multiplexing transmission system, optical channel monitor and optical channel monitoring method | Hiromitsu Sugahara | 2014-09-16 |
| 8238745 | Collection of data from an optical channel monitor without causing a malfunction of a transmission apparatus | — | 2012-08-07 |
| 8135280 | Method and system for power stability control in wavelength division multiplexing networks | Lei Zong, Ting Wang, Katsuyuki Mino, Osamu Matsuda | 2012-03-13 |
| 8095011 | Wavelength division multiplexing filter, wavelength division multiplexing system, and wavelength division multiplexing method | Yutaka Yano | 2012-01-10 |
| 7649162 | Optical feedback control unit, optical communication system, feedback control method, and recording medium for recording program | Hiroki Rikiyama, Koji Asahi | 2010-01-19 |
| 7389032 | Method and apparatus for adjusting loss caused by optical fiber curvature, and optical transmission system using the same | — | 2008-06-17 |
| 7127183 | Output monitor/control apparatus and optical communication system | — | 2006-10-24 |
| 6911627 | Heating element device, heating element mounted structure, temperature control circuit, temperature control apparatus, and module | Nobutaka Watanabe | 2005-06-28 |
| 6601401 | Temperature controller and light-waveguide with the same | — | 2003-08-05 |
| 6597483 | Laser oscillation wavelength monitoring device | — | 2003-07-22 |
| 5936768 | Optical passive device for an optical fiber amplifier and the optical amplifier | — | 1999-08-10 |
| 5880874 | Optical equalizer and optical amplifier and wavelength multiple optical transmission apparatus using optical equalizer | Takashi Shibuya | 1999-03-09 |