Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8891961 | Optical communication device, wavelength number measurement device, optical repeater, and wavelength number measurement method | Taizo Maeda, Takuya Miyashita | 2014-11-18 |
| 8873972 | Optical transmission apparatus and optical transmission system | Takuya Miyashita | 2014-10-28 |
| 8805194 | Optical transmission device and optical switch device | — | 2014-08-12 |
| 8699884 | Optical transmission system and optical transmission method | Motoyoshi Sekiya | 2014-04-15 |
| 8670665 | Optical apparatus using polarized orthogonal control | Noriaki Mizuguchi, Yoichi Oikawa | 2014-03-11 |
| 8121481 | Chromatic dispersion compensation designing method in optical network and a system thereof | Toru Katagiri, Tomohiro Hashiguchi, Yutaka Takita, Kazuyuki Tajima, Motoyoshi Sekiya | 2012-02-21 |
| 8078701 | Network design and determination of the arrangement of optical transmission devices in respective network stations | Tomohiro Hashiguchi, Toru Katagiri, Kazuyuki Tajima | 2011-12-13 |
| 7991301 | Detecting abnormality in an optical receiver | Noriaki Mizuguchi, Yoshikazu Terayama, Kenichi Kaburagi | 2011-08-02 |
| 7831118 | Coarse wavelength division multiplexing optical transmission system, and coarse wavelength division multiplexing optical transmission method | Yoichi Oikawa, Tomoyuki Ohtsuka | 2010-11-09 |
| 7684713 | Phase control apparatus and optical DQPSK receiver | Yoshikazu Terayama, Noriaki Mizuguchi, Eiji Ishikawa, Kenichi Kaburagi, Takeshi Hoshida +2 more | 2010-03-23 |
| 7039325 | Communication system | Motoyoshi Sekiya | 2006-05-02 |