Issued Patents All Time
Showing 101–125 of 128 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6608854 | Method, device, and system for waveform shaping of signal light | — | 2003-08-19 |
| 6504972 | Optical fiber communication system using optical phase conjugation as well as apparatus applicable to the system and method of producing the same | — | 2003-01-07 |
| 6477300 | Method, device, and system for waveform shaping of signal light | Shinichi Takeda, Kazuo Hironishi | 2002-11-05 |
| 6453082 | Device and system for waveform shaping | — | 2002-09-17 |
| 6424773 | Optical gate device, manufacturing method for the device, and system including the device | — | 2002-07-23 |
| 6424774 | Tunable wavelength four light wave mixer | Shinichi Takeda | 2002-07-23 |
| 6341026 | Optical communication system using optical phase conjugation to suppress waveform distortion caused by chromatic dispersion and optical kerr effect | — | 2002-01-22 |
| 6307984 | Optical fiber communication system using optical phase conjugation as well as apparatus applicable to the system and method of producing the same | — | 2001-10-23 |
| 6304348 | Optical communication method and optical communication system based on optical phase conjugation | — | 2001-10-16 |
| 6262828 | Method and apparatus of driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line | Yuichi Akiyama, George Ishikawa, Hiroki Ooi | 2001-07-17 |
| 6175435 | Optical communication system using optical phase conjugation to suppress waveform distortion caused by chromatic dispersion and optical kerr effect | — | 2001-01-16 |
| 6160942 | Optical fiber communication system using optical phase conjugation | — | 2000-12-12 |
| 5982530 | Apparatus for driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line | Yuichi Akiyama, George Ishikawa, Hiroki Ooi | 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, Hiroki Ooi | 1999-10-26 |
| 5920588 | Method and device for generation of phase conjugate light and wavelength conversion, and system having the device | — | 1999-07-06 |
| 5896211 | Optical communication system | — | 1999-04-20 |
| 5798853 | Optical communication system compensating for chromatic dispersion and phase conjugate light generator for use therewith | — | 1998-08-25 |
| 5598289 | Optical systems making use of phenomenon of stimulated brillouin scattering | — | 1997-01-28 |
| 5596667 | Application of phase conjugate optics to optical systems | — | 1997-01-21 |
| 5515192 | Optical systems making use of phenomenon of stimulated brillouin scattering | — | 1996-05-07 |
| 5432632 | Optical communication system | — | 1995-07-11 |
| 5272885 | Air-conditioning apparatus having heat source unit and plural indoor units connected to the heat source unit | — | 1993-12-28 |
| 5253097 | Demodulator and a polarization diversity receiver for coherent optical communication provided with the demodulator | Takao Naito, Terumi Chikama, Tetsuya Kiyonaga, Hiroshi Nakamoto, George Ishikawa | 1993-10-12 |
| 5228043 | Direct modulation phase shift keying (DM-PSK) transmission system | Takao Naito, Terumi Chikama, Hideo Kuwahara | 1993-07-13 |
| 5115332 | Receiver for coherent optical communication | Takao Naito, Terumi Chikama, Tetsuya Kiyonaga, Yoshihito Onoda, Hideo Kuwahara | 1992-05-19 |