Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11165501 | Excitation light source apparatus and optical transmission system | Katsunori Imanishi, Shun Chikamori, Kengo Takata | 2021-11-02 |
| 11128380 | Signal light interruption detection device, optical amplifier, optical wavelength multiplex transmission device, and optical wavelength multiplex transmission system | Kanehiro Matsumoto, Shun Chikamori, Kengo Takata | 2021-09-21 |
| 10971888 | Optical amplifier | Hiroshi Miura | 2021-04-06 |
| 10708676 | Optical transmission line switching apparatus, optical transmission system, and transmission line switching method | Shun Chikamori, Katsunori Imanishi, Kengo Takata | 2020-07-07 |
| 9831953 | Excitation light source device and optical transmission system | Katsunori Imanishi, Hideki Sueoka, Kengo Takata | 2017-11-28 |
| 9628173 | Optical transmission line switching apparatus and optical transmission system | Shun Chikamori | 2017-04-18 |
| 9478935 | Optical amplifier, wavelength multiplexing optical transmission system, and program | Kazuyuki Ishida | 2016-10-25 |
| 9036995 | Optical communication system | Kazuyuki Ishida, Takashi Mizuochi | 2015-05-19 |
| 8320771 | Optical transmission system and repeater | Tsuyoshi Yoshida, Takashi Sugihara, Katsuhiro Shimizu, Aritomo Uemura, Hiroki Shima +1 more | 2012-11-27 |
| 8208812 | Optical relay device and optical relay transmission system | Katsuhiro Shimizu, Kazuyuki Ishida, Kuniaki Motoshima | 2012-06-26 |
| 7768698 | Raman amplifier and optical communication system | Katsuhiro Shimizu, Tasuku Fujieda, Ken'ichi Asakawa, Hitoshi Mikada, Katsuyoshi Kawaguchi | 2010-08-03 |
| 7539413 | Observation apparatus and observation system | Hiroaki Munehira, Junichi Nakagawa, Kenichi Asakawa, Hitoshi Mikada, Katsuyoshi Kawaguchi | 2009-05-26 |
| 7218441 | Non-polarization light source device and raman amplifier | Taichi Kogure, Takashi Sugihara, Kuniaki Motoshima | 2007-05-15 |
| 7068421 | Raman amplifier and optical relay transmission system | Taichi Kogure, Satoshi Kajiya, Takashi Mizuochi | 2006-06-27 |