Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11108208 | Optical amplification system and optical amplification method | Takuya Oda, Tetsuro Inui, Akira Hirano, Wataru Imajuku, Shoukei Kobayashi +2 more | 2021-08-31 |
| 10686520 | Transmission quality estimation system, transmission quality estimation device, and transmission quality estimation method | Takuya Oda, Tetsuro Inui, Akira Hirano, Wataru Imajuku, Shoukei Kobayashi +2 more | 2020-06-16 |
| 10615868 | Communication system and fault detection method | Takuya Oda, Tetsuro Inui, Akira Hirano, Wataru Imajuku, Shoukei Kobayashi +2 more | 2020-04-07 |
| 10527781 | Communication system and connector | Takuya Oda, Tetsuro Inui, Akira Hirano, Wataru Imajuku, Shoukei Kobayashi +2 more | 2020-01-07 |
| 10511381 | Communication system and fault location specifying method | Takuya Oda, Tetsuro Inui, Akira Hirano, Wataru Imajuku, Shoukei Kobayashi +2 more | 2019-12-17 |
| 9762982 | Multi-flow optical transceiver, multi-flow optical transponder and multi-flow optical node | Kazushige Yonenaga, Masahiko Jinno, Kohki Shibahara, Takashi Goh | 2017-09-12 |
| 9479282 | Optical communication apparatus, optical route switching apparatus and network | Masahiko Jinno, Kazushige Yonenaga, Akira Hirano, Yoshiaki Sone | 2016-10-25 |
| 9326049 | Multi-flow optical transceiver, multi-flow optical transponder and multi-flow optical node | Kazushige Yonenaga, Masahiko Jinno, Kohki Shibahara, Takashi Goh | 2016-04-26 |
| 9065243 | Optical amplifier | Masaki Asobe, Takeshi Umeki, Kouji Enbutsu, Akio Tokura, Yutaka Miyamoto +2 more | 2015-06-23 |
| 8964581 | Bandwidth variable communication method, bandwidth variable communication apparatus, transmission bandwidth determination apparatus, transmission bandwidth determination method, node apparatus, communication path setting system, communication path setting | Masahiko Jinno, Atsushi Watanabe, Kozicki Bartlomiej, Yoshiaki Sone, Akira Hirano +1 more | 2015-02-24 |
| 8526438 | Bandwidth variable communication apparatus and bandwidth variable communication method | Masahiko Jinno, Yukio Tsukishima, Kozicki Bartlomiej, Kazushige Yonenaga, Toshihide Yoshimatsu +1 more | 2013-09-03 |
| 7684697 | Optical signal quality monitoring circuit and optical signal quality monitoring method | Ippei Shake, Atsushi Taniguchi | 2010-03-23 |
| 7668459 | Dispersion monitoring method and apparatus and dispersion slope temperature dependency compensation method and apparatus | Tetsuro Inui, Takashi Yamamoto | 2010-02-23 |
| 7200328 | Method and system for determining origin of optical signal quality degradation | Ippei Shake, Kentaro Uchiyama | 2007-04-03 |
| 7190752 | Data signal quality evaluation method and apparatus using high speed sampling | Ippei Shake | 2007-03-13 |
| 7151897 | Optical clock phase-locked loop circuit | Takuya Ohara, Satoki Kawanishi | 2006-12-19 |
| 7079765 | Optical wavelength division multiplex signal monitoring apparatus | Ippei Shake | 2006-07-18 |
| 7024122 | Ultrahigh-speed clock extraction circuit | Kentaro Uchiyama, Eiichi Yamada, Etsu Hashimoto, Toshio Morioka | 2006-04-04 |
| 6842565 | Optical modulation/multiplexing circuit | Takuya Ohara, Ippei Shake, Satoki Kawanishi | 2005-01-11 |
| 6720548 | Optical sampling waveform measuring apparatus aiming at achieving wider band | Akihito Otani, Toshinobu Otsubo, Ippei Shake, Satoki Kawanishi | 2004-04-13 |
| 6697395 | Sum frequency light generation method and sum frequency light generation apparatus adapatble for wide-band wavelength conversion | Akihito Otani, Toshinobu Otsubo, Ippei Shake, Satoki Kawanishi | 2004-02-24 |
| 6671444 | Optical fiber | Shinichi Arai, Takeshi Yagi, Kunihiko Mori, Satoki Kawanishi | 2003-12-30 |
| 6587242 | Optical transmission system | Ippei Shake, Yoshiaki Yamabayashi, Osamu Kamatani, Koji Nonaka, Kentaro Uchiyama | 2003-07-01 |
| 6396601 | System for monitoring quality of optical signals having different bit rates | Yoshiaki Yamabayashi, Ippei Shake | 2002-05-28 |
| 6154309 | Complementary optical sampling waveform measuring apparatus and polarization beam splitter which can be assembled therein | Akihito Otani, Toshinobu Otsubo, Satoki Kawanishi | 2000-11-28 |