Issued Patents All Time
Showing 51–74 of 74 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7792428 | Optical add/drop multiplexer | Takafumi Terahara, Hiroki Ooi, Jens Rasmussen, Akira Miura, Akihiko Isomura | 2010-09-07 |
| 7773283 | Optical modulation device and optical modulation method | Toshiki Tanaka, Hideyuki Miyata, Takeshi Hoshida | 2010-08-10 |
| 7734192 | Control apparatus and control method for optical modulator | Hiroki Ooi | 2010-06-08 |
| 7720383 | Optical transmission apparatus having OADM function | Takafumi Terahara, Hiroki Ooi | 2010-05-18 |
| 7711270 | Optical node and optical add/drop multiplexer | Hiroki Ooi, Takafumi Terahara, Jens Rasmussen, Akira Miura, Akihiko Isomura | 2010-05-04 |
| 7657190 | Optical transmitter apparatus | — | 2010-02-02 |
| 7603007 | Quadrature phase-shift keying modulator and phase shift amount controlling method for the same | Takafumi Terahara, Takeshi Hoshida, Kentaro Nakamura, Hiroki Ooi, Jens Rasmussen +1 more | 2009-10-13 |
| 7505414 | Network designing device and computer-readable medium | Hisao Nakashima, Takeshi Hoshida, Takafumi Terahara | 2009-03-17 |
| 7418211 | Control apparatus and control method for optical modulator | Hiroki Ooi | 2008-08-26 |
| 7382979 | Wavelength dispersion compensation design method and a system thereof | Takafumi Terahara, Takeshi Hoshida, Hisao Nakashima | 2008-06-03 |
| 7321736 | Optical receiving station, optical communication system, and dispersion controlling method | Hiroki Ooi, George Ishikawa | 2008-01-22 |
| 7035548 | Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method | Hiroki Ooi, George Ishikawa | 2006-04-25 |
| 7006770 | Optical receiving station, optical communication system, and dispersion controlling method | Hiroki Ooi, George Ishikawa | 2006-02-28 |
| 6809849 | Control apparatus and control method for an optical method | George Ishikawa | 2004-10-26 |
| 6728491 | Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method | Hiroki Ooi, George Ishikawa | 2004-04-27 |
| 6661974 | Optical transmitter and optical transmission system | George Ishikawa, Hiroki Ooi, Terumi Chikama | 2003-12-09 |
| 6262828 | Method and apparatus of driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line | George Ishikawa, Hiroki Ooi, Shigeki Watanabe | 2001-07-17 |
| 5982530 | Apparatus for driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line | George Ishikawa, Hiroki Ooi, Shigeki Watanabe | 1999-11-09 |
| 5973816 | Method and apparatus of driving an optical modulator to measure, and compensation for dispersion in an optical transmission line | George Ishikawa, Hiroki Ooi, Shigeki Watanabe | 1999-10-26 |
| 5633537 | Multiplex transmission apparatus | Yasuhiko Kurata | 1997-05-27 |
| 5629495 | Waterproof box-like casing | Tatsuya Sumida, Yasuo Matsushita | 1997-05-13 |
| 5550830 | Multiplex transmission apparatus and method | Yasuhiko Kurata, Osamu Michihira | 1996-08-27 |
| 5483517 | Multiplex transmission apparatus | Yasuhiko Kurata | 1996-01-09 |
| 4614230 | Heat exchanger | Kiyoshi Sakuma, Tetsuji Okada, Yu Seshimo, Kazuhiro Maruyama, Kisuke Yamazaki | 1986-09-30 |