Issued Patents All Time
Showing 51–75 of 82 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7262913 | Chromatic dispersion and dispersion slope compensating apparatus | Akira Miura, Yasuhiro Yamauchi, Yoshinobu Kubota | 2007-08-28 |
| 7218856 | System for compensating for chromatic dispersion and polarization mode dispersion | Tomoo Takahara, Jens Rasmussen, George Ishikawa | 2007-05-15 |
| 7146107 | Method and apparatus for adjusting filter device | Kentaro Nakamura, Tomoo Takahara | 2006-12-05 |
| 7035548 | Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method | George Ishikawa, Yuichi Akiyama | 2006-04-25 |
| 7030973 | Polarization mode dispersion compensator based on degree of polarization | Jens Rasmussen, George Ishikawa, Takafumi Terahara | 2006-04-18 |
| 7006770 | Optical receiving station, optical communication system, and dispersion controlling method | Yuichi Akiyama, George Ishikawa | 2006-02-28 |
| 6925262 | Method and system for compensating chromatic dispersion | George Ishikawa | 2005-08-02 |
| 6829440 | Method and apparatus for compensation of polarization-mode dispersion | George Ishikawa | 2004-12-07 |
| 6728491 | Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method | George Ishikawa, Yuichi Akiyama | 2004-04-27 |
| 6661974 | Optical transmitter and optical transmission system | Yuichi Akiyama, George Ishikawa, Terumi Chikama | 2003-12-09 |
| 6606424 | Apparatus and method for optical modulation and demodulation | Minoru Seino, George Ishikawa | 2003-08-12 |
| 6501580 | Method and apparatus for optimizing dispersion in an optical fiber transmission line in accordance with an optical signal power level | George Ishikawa, Naoki Kuwata | 2002-12-31 |
| 6456411 | Method of setting signal wavelength in optical transmission system | George Ishikawa | 2002-09-24 |
| 6411416 | Method and apparatus for minimizing the intensity of a specific frequency component of an optical signal travelling through an optical fiber transmission line to thereby minimize the total dispersion | George Ishikawa | 2002-06-25 |
| 6362913 | Optical modulation apparatus and method of controlling optical modulator | Hiroshi Nakamoto, George Ishikawa, Takuji Yamamoto, Yoshinori Nishizawa | 2002-03-26 |
| 6278539 | Optical modulation apparatus and method of controlling | Hiroshi Nakamoto, George Ishikawa, Takuji Yamamoto, Yoshinori Nishizawa | 2001-08-21 |
| 6262828 | Method and apparatus of driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line | Yuichi Akiyama, George Ishikawa, Shigeki Watanabe | 2001-07-17 |
| 6204949 | Method and device for extracting a timing signal | George Ishikawa, Takeshi Ihara | 2001-03-20 |
| 6118564 | Optical time division demultiplexing apparatus and demultiplexed signal switching method as well as optical time division multiplex transmission system | George Ishikawa, Hiroshi Nishimoto | 2000-09-12 |
| 6081360 | Method and apparatus for optimizing dispersion in an optical fiber transmission line in accordance with an optical signal power level | George Ishikawa, Naoki Kuwata | 2000-06-27 |
| 5991477 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | George Ishikawa, Hiroshi Nishimoto, Motoyoshi Sekiya, Hiroaki Tomofuji | 1999-11-23 |
| 5982530 | Apparatus for driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line | Yuichi Akiyama, George Ishikawa, 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 | Yuichi Akiyama, George Ishikawa, Shigeki Watanabe | 1999-10-26 |
| 5926297 | Optical modulating device and optical modulating method | George Ishikawa, Hiroshi Nishimoto | 1999-07-20 |
| 5917628 | Optical time-division multiplexer capable of supplying stable output signal | George Ishikawa, Hiroshi Nishimoto | 1999-06-29 |