Issued Patents All Time
Showing 1–25 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9244217 | Bi-directional optical communication method and multi-core optical fiber | Eisuke Sasaoka, Tetsuya Hayashi | 2016-01-26 |
| 7330302 | Optical transmission system | Toshiyuki Miyamoto, Masayuki Nishimura | 2008-02-12 |
| 7170674 | Fluorescence glass, optical wave guide for optical amplifier and optical amplifier module | Motoki Kakui, Shinji Ishikawa, Ichiro Tsuchiya, Takahiro Murata | 2007-01-30 |
| 7139483 | Optical communication system | Toru Murase, Iwao Sasase, Katsuhiro Kamakura | 2006-11-21 |
| 7027215 | Optical component, optical amplification module, and optical transmission system | Hitoshi Hatayama, Motoki Kakui, Tatsuhiko Shitomi | 2006-04-11 |
| 6952309 | Optical amplifier and optical amplification method | Tetsufumi Tsuzaki, Masayuki Nishimura, Hitoshi Hatayama, Eisuke Sasaoka | 2005-10-04 |
| 6898002 | Optical device, optical module, optical amplifier, and optical transmission system | Kenichiro Takahashi, Tomomi Sano, Akira Inoue, Toshikazu Shibata | 2005-05-24 |
| 6625187 | Semiconductor optical device and method of manufacturing the same | Nobuyuki Ikoma, Akira Ishida, Shigenori Takagishi, Mitsuo Takahashi, Tsukuru Katsuyama | 2003-09-23 |
| 6512613 | WDM transmission repeater, WDM transmission system and WDM transmission method | Shigeru Tanaka, Masayuki Nishimura, Yasunori Murakami | 2003-01-28 |
| 6504647 | Optical fiber amplifier, a method of amplifying optical signals, optical communications system | — | 2003-01-07 |
| 6415078 | Laser light source and manufacturing method therefor | Masakazu Shigehara, Takashi Kato | 2002-07-02 |
| 6317538 | Optical waveguide device and optical device having long-period grating | Masakazu Shigehara, Motoki Kakui | 2001-11-13 |
| 6259554 | Optical amplifier repeater system | Masayuki Nishimura | 2001-07-10 |
| 6067392 | Optical fiber diffraction grating, a method of fabricating thereof and a laser light source | Toshinori Wakami, Yoshiaki Terasawa, Akira Inoue, Masakazu Shigehara, Toru Iwashima | 2000-05-23 |
| 6055081 | Chromatic dispersion compensator and chromatic dispersion compensating optical communication system | Yasushi Koyano | 2000-04-25 |
| 5835259 | Optical fiber amplifier | Motoki Kakui | 1998-11-10 |
| 5742427 | Optical fiber amplifier | Motoki Kakui | 1998-04-21 |
| 5721635 | Optical fiber amplifier and optical amplifier repeater | Koji Nakazato, Tomonori Kashiwada, Masayuki Nishimura | 1998-02-24 |
| 5701188 | Chromatic dispersion compensator and chromatic dispersion compensating optical communication system | Yasushi Koyano | 1997-12-23 |
| 5694239 | Optical phase conjugator, optical transmission system using the same, and optical phase conjugation method | Masayuki Nishimura | 1997-12-02 |
| 5680491 | Optical fiber dispersion compensation device for optical communication system | Tomonori Kashiwada, Masayuki Nishimura | 1997-10-21 |
| 5640269 | Optical fiber amplifier and optical amplifier repeater | Koji Nakazato, Tomonori Kashiwada, Masayuki Nishimura | 1997-06-17 |
| 5572356 | Optical amplifier | Ichiro Yoshida, Michio Murata | 1996-11-05 |
| 5532870 | Optical fiber amplifier and optical amplifier repeater | Koji Nakazato, Tomonori Kashiwada, Masayuki Nishimura | 1996-07-02 |
| RE35222 | Optical fiber component optical coupler and method of producing thereof | Sumio Hoshino, Masumi Ito, Hiroo Kanamori, Hisasi Izumita | 1996-04-30 |