Issued Patents All Time
Showing 51–75 of 75 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6252688 | Optical wavelength multiplex transmission method and optical dispersion compensation method | Hideyuki Miyata, Hiroshi Onaka, Motoyoshi Sekiya, Kazue Okazaki | 2001-06-26 |
| 6252687 | Optical wavelength multiplex transmission method and optical dispersion compensation method | Hideyuki Miyata, Hiroshi Onaka, Motoyoshi Sekiya, Kazue Otsuka | 2001-06-26 |
| 6243176 | Optical wavelength multiplex transmission method and optical dispersion compensation method | Hideyuki Miyata, Hiroshi Onaka, Motoyoshi Sekiya, Kazue Otsuka | 2001-06-05 |
| 6204949 | Method and device for extracting a timing signal | Hiroki Ooi, 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 | Hiroki Ooi, 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 | Hiroki Ooi, Naoki Kuwata | 2000-06-27 |
| 5991477 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | Hiroshi Nishimoto, Hiroki Ooi, 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, 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 | Yuichi Akiyama, Hiroki Ooi, Shigeki Watanabe | 1999-10-26 |
| 5926297 | Optical modulating device and optical modulating method | Hiroshi Nishimoto, Hiroki Ooi | 1999-07-20 |
| 5917628 | Optical time-division multiplexer capable of supplying stable output signal | Hiroki Ooi, Hiroshi Nishimoto | 1999-06-29 |
| 5917637 | Method of and device for driving optical modulator, and optical communications system | Hiroshi Nishimoto | 1999-06-29 |
| 5909297 | Drift compensating circuit for optical modulators in an optical system | Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1999-06-01 |
| 5896217 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1999-04-20 |
| 5870213 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1999-02-09 |
| 5815294 | Optical transmission system with transmission characteristic measuring device | Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1998-09-29 |
| 5805321 | Control unit for optical modulators producing multiplexed optical output signal | Hiroki Ooi, Hiroshi Nishimoto | 1998-09-08 |
| 5760937 | Optical demultiplexer | Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1998-06-02 |
| 5754322 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1998-05-19 |
| 5717510 | Optimized optical transmission system for high capacity transmission | Hiroshi Nishimoto | 1998-02-10 |
| 5696614 | Optical wavelength multiplex transmission method and optical dispersion compensation method | Hideyuki Miyata, Hiroshi Onaka, Motoyoshi Sekiya, Kazue Otsuka | 1997-12-09 |
| 5636046 | Optical dispersion compensation method using transmissible band determined from synergetic effect of self phase modulation and group velocity dispersion | Hideyuki Miyata, Hiroshi Onaka, Motoyoshi Sekiya, Kazue Otsuka | 1997-06-03 |
| 5612807 | Optical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical system | Hideyuki Miyata, Hiroshi Onaka, Motoyoshi Sekiya, Kazue Otsuka | 1997-03-18 |
| 5602666 | Optical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical system | Hideyuki Miyata, Hiroshi Onaka, Motoyoshi Sekiya, Kazue Otsuka | 1997-02-11 |
| 5253097 | Demodulator and a polarization diversity receiver for coherent optical communication provided with the demodulator | Takao Naito, Terumi Chikama, Shigeki Watanabe, Tetsuya Kiyonaga, Hiroshi Nakamoto | 1993-10-12 |