Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7194210 | Wavelength division multiplexing optical transmission equipment and method of amplifying optical wavelength division multiplexed signals | Shigehiro Takashima, Shigenori Hayase, Yoshimasa Kusano, Satoshi Asamizu, Hirofumi Nakano | 2007-03-20 |
| 7116908 | Optical transmission system for substantially equalizing the output signal level among frequency bands and substantially lowering the signal-to-noise ratio | Hiroshi Masuda, Hirofumi Nakano, Eita Miyasaka, Satoshi Asamizu | 2006-10-03 |
| 7064888 | Optical transmission equipment for suppressing a four wave mixing and optical transmission system | Ryoichi Miyake, Takeshi Nakada, Yoshimasa Kusano, Elichirou Takizawa | 2006-06-20 |
| 7039272 | Optical transmission equipment with dispersion compensation, and dispersion compensating method | — | 2006-05-02 |
| 6999230 | Optical transmission equipment for suppressing a four wave mixing and optical transmission system | Ryoichi Miyake, Takeshi Nakada, Yoshimasa Kusano, Eiichirou Takizawa | 2006-02-14 |
| 6983248 | Methods and apparatus for recognized word registration in accordance with speech recognition | Yoshinori Tahara, Norikazu Ichikawa, Daisuke Tomoda | 2006-01-03 |