Issued Patents All Time
Showing 26–50 of 107 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6819829 | Optical communication system | Tetsufumi Tsuzaki | 2004-11-16 |
| 6819477 | Raman amplifier module and optical transmission system using the same | Tetsufumi Tsuzaki, Masaaki Hirano | 2004-11-16 |
| 6806999 | Raman amplification pumping module, Raman amplifier, and optical communication system | Tetsufumi Tsuzaki, Motoki Kakui | 2004-10-19 |
| 6801683 | Optical module, light divider/insertor and light transmission device | Tomohiko Kanie, Makoto Katayama, Hiroshi Suganuma | 2004-10-05 |
| 6798564 | Raman amplification method, raman amplifier, and optical transmission system | Masayuki Inoue | 2004-09-28 |
| 6795235 | Optical transmission line, method of making optical transmission line, and optical transmission system | Toshiaki Okuno | 2004-09-21 |
| 6782151 | Raman amplifier, optical transmission system and optical fiber | Eisuke Sasaoka, Shigeru Tanaka | 2004-08-24 |
| 6782185 | Optical variable attenuator and optical module | Makoto Katayama, Tomohiko Kanie, Hiroshi Suganuma | 2004-08-24 |
| 6782168 | Apparatus for and method of monitoring wavelength multiplexed signal light as well as optical transmission system using the same | Hitoshi Hatayama, Chisai Hirose | 2004-08-24 |
| 6782155 | Optical switch | Makoto Katayama, Manabu Shiozaki, Tomohiko Kanie | 2004-08-24 |
| 6769822 | Optical fiber composite and optical fiber cable and production method thereof | Shigeru Tanaka | 2004-08-03 |
| 6766088 | Optical fiber and method for making the same | Takemi Hasegawa, Masashi Onishi, Eisuke Sasaoka | 2004-07-20 |
| 6763194 | Optical transmission system and channel assigning method | Toshiaki Okuno | 2004-07-13 |
| 6728452 | Optical cable, method of installing optical cable, and optical transmission line | — | 2004-04-27 |
| 6724525 | Raman amplifying control unit and optical transmission system | Toshiaki Okuno, Eisuke Sasaoka, Shigeru Tanaka | 2004-04-20 |
| 6718105 | Optical fiber | Takemi Hasegawa, Eisuke Sasaoka | 2004-04-06 |
| 6704135 | Operation mode switching apparatus, Raman amplifier and optical transmission system | Eisuke Sasaoka | 2004-03-09 |
| 6659614 | Variable dispersion compensator and optical transmission system | Makoto Katayama, Tomohiko Kanie, Shunichi Tsuchiya | 2003-12-09 |
| 6643431 | Optical device and control method thereof | Hitoshi Hatayama, Chisai Hirose, Makoto Katayama | 2003-11-04 |
| 6636677 | Optical fiber | Takemi Hasegawa, Eisuke Sasaoka, Masashi Onishi | 2003-10-21 |
| 6633698 | Optical filter | Hitoshi Hatayama | 2003-10-14 |
| 6618532 | Optical transmission line | Eisuke Sasaoka, Shigeru Tanaka, Shinji Ishikawa, Takatoshi Kato | 2003-09-09 |
| 6606440 | Microstructured optical fiber | Takemi Hasegawa, Eisuke Sasaoka | 2003-08-12 |
| 6574397 | Optical multiplexer/demultiplexer | Makoto Katayama, Shigeru Tanaka | 2003-06-03 |
| 6571045 | Microstructured optical fiber | Takemi Hasegawa, Eisuke Sasaoka | 2003-05-27 |