Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10243664 | Optical modulator driver circuit and optical transmitter | Munehiko Nagatani, Hideyuki Nosaka, Toshihiro Itoh, Koichi Murata, Hiroyuki Fukuyama +15 more | 2019-03-26 |
| 10171173 | Optical signal transmission apparatus and optical signal transmission method | Seiji Okamoto, Koichi Ishihara, Etsushi Yamazaki, Mitsuteru YOSHIDA, Kazushige Yonenaga +3 more | 2019-01-01 |
| 10122462 | Transport apparatus and transport method | Takuya Ohara, Kei Kitamura, Yoshiaki Kisaka, Shigeki Aisawa, Masahiro Suzuki +5 more | 2018-11-06 |
| 10090921 | Light modulation device and light modulation method | Mikio Yoneyama, Hiroto Kawakami, Takashi Ono, Akihiko Matsuura, Katsuya Tanaka +2 more | 2018-10-02 |
| 10038507 | Optical transmission system, phase compensation method, and optical reception apparatus | Mitsuteru YOSHIDA, Etsushi Yamazaki, Seiji Okamoto, Hiroyuki Uzawa, Kengo Horikoshi +6 more | 2018-07-31 |
| 9667350 | Optical receiving device and phase cycle reduction method | Kengo Horikoshi, Kohki Shibahara, Etsushi Yamazaki, Mitsuteru YOSHIDA, Koichi Ishihara +4 more | 2017-05-30 |
| 9621299 | Coherent communication system, communication method, and transmission method | Koichi Ishihara, Masato Mizoguchi, Tomoki Murakami, Yoshiaki Kisaka, Tadao Nakagawa +5 more | 2017-04-11 |
| 9294826 | Wavelength selection switch system and method for controlling wavelength selection switch | Mitsunori Fukutoku, Etsu Hashimoto, Akio Sahara, Norio Sato, Yosuke Takeuchi | 2016-03-22 |
| 8005374 | Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission system | Kazushige Yonenaga, Mikio Yoneyama, Masahito Tomizawa, Akira Hirano, Shoichiro Kuwahara +2 more | 2011-08-23 |
| 7734194 | Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission system | Kazushige Yonenaga, Mikio Yoneyama, Masahito Tomizawa, Akira Hirano, Shoichiro Kuwahara +2 more | 2010-06-08 |
| 6983085 | Optical transmission circuit | Akira Hirano, Akihiko Matsuura | 2006-01-03 |