Issued Patents All Time
Showing 26–50 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7151866 | Optical device module | Tadao Nakazawa, Hirofumi Aota, Kazuaki Akimoto, Yoichi Oikawa | 2006-12-19 |
| 7120321 | Control method and device for optical filter | Yutaka Kai, Isao Tsuyama | 2006-10-10 |
| 7079728 | Wavelength multiplexing processing apparatus | Goji Nakagawa | 2006-07-18 |
| 7061669 | Optical apparatus with loss compensation capability and optical amplifier for loss compensation | Hisao Nakashima, Miki Onaka, Masato Nishihara, Etsuko Hayashi | 2006-06-13 |
| 7020399 | Optical transmission apparatus and method which adjust rise and fall time of signal light to be transmitted | Hiroshi Nakamoto, Hiroshi Onaka | 2006-03-28 |
| 7006771 | Optical communication apparatus and optical add/drop apparatus | Hiroshi Onaka | 2006-02-28 |
| 6996142 | Light source device and wavelength control device therefor | Yutaka Kai | 2006-02-07 |
| 6947630 | Control method and control apparatus for variable wavelength optical filter | Yutaka Kai, Isao Tsuyama | 2005-09-20 |
| 6934433 | Control method and control apparatus of optical device | Hiroshi Onaka, Tadao Nakazawa, Yutaka Kai, Hiroshi Miyata, Yoichi Takasu +1 more | 2005-08-23 |
| 6930824 | Optical amplifier which compensates for dispersion of a WDM optical signal | George Ishikawa, Hiroshi Onaka, Motoyoshi Sekiya, Kazue Otsuka | 2005-08-16 |
| 6925214 | Connecting method of optical function devices, and optical apparatus | Yoshihiko Kaitoh, Tadao Nakazawa, Masaharu Doi | 2005-08-02 |
| 6917732 | Connecting method of optical function devices, and optical apparatus | Yoshihiko Kaitoh, Tadao Nakazawa, Masaharu Doi | 2005-07-12 |
| 6895141 | Control method and device for optical filter, and optical node device | Yutaka Kai, Isao Tsuyama | 2005-05-17 |
| 6870972 | Connecting method of optical devices, and optical apparatus | Yoshihiko Kaitoh, Tadao Nakazawa | 2005-03-22 |
| 6783282 | Optical wavelength filter | Tadao Nakazawa, Masaharu Doi | 2004-08-31 |
| 6785306 | Wavelength-tunable stabilizer laser | Yutaka Kai | 2004-08-31 |
| 6782017 | Wavelength locker and wavelength discriminating apparatus | Yutaka Kai, Hiroshi Onaka | 2004-08-24 |
| 6594069 | Control method and control apparatus of optical wavelength variable filter | Tadao Nakazawa | 2003-07-15 |
| 6583900 | Optical transmission apparatus, optical transmission system, and optical terminal station | Hiroshi Onaka, Kazue Otsuka, Yutaka Kai, Tadao Nakazawa, Terumi Chikama | 2003-06-24 |
| 6545784 | Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit | Kazue Okazaki, Hiroshi Onaka, Yutaka Kai, Terumi Chikama | 2003-04-08 |
| 6417945 | Optical wavelength multiplex transmission method and optical dispersion compensation method | George Ishikawa, Hiroshi Onaka, Motoyoshi Sekiya, Kazue Okazaki | 2002-07-09 |
| 6384943 | Optical wavelength multiplex transmission method and optical dispersion compensation method | George Ishikawa, Hiroshi Onaka, Motoyoshi Sekiya, Kazue Okazaki | 2002-05-07 |
| 6366376 | Optical transmitting device using wavelength division multiplexing to transmit signal lights having frequencies arranged to eliminate effects of four-wave mixing (FWM) | Hiroshi Onaka, Terumi Chikama | 2002-04-02 |
| 6351323 | Optical transmission apparatus, optical transmission system, and optical terminal station | Hiroshi Onaka, Kazue Otsuka, Yutaka Kai, Tadao Nakazawa, Terumi Chikama | 2002-02-26 |
| 6285479 | Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit | Kazue Okazaki, Hiroshi Onaka, Yutaka Kai, Terumi Chikama | 2001-09-04 |