Issued Patents 2004
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6805497 | Optical transmission line | Shinji Ishikawa, Motonori Nakamura, Masao Tsukitani | 2004-10-19 |
| 6791744 | Raman amplification optical fiber, optical fiber coil, raman amplifier, and optical communication system | Motoki Kakui, Masashi Onishi, Toshiki Tanaka, Takao Naito | 2004-09-14 |
| 6782151 | Raman amplifier, optical transmission system and optical fiber | Masayuki Nishimura, Shigeru Tanaka | 2004-08-24 |
| 6766088 | Optical fiber and method for making the same | Takemi Hasegawa, Masashi Onishi, Masayuki Nishimura | 2004-07-20 |
| 6744954 | Submarine optical cable, optical fiber unit employed in the submarine optical cable, and method of making optical fiber unit | Shigeru Tanaka, Itaru Sakabe, Takeo Tsurumi, Yasushi Ito | 2004-06-01 |
| 6724525 | Raman amplifying control unit and optical transmission system | Toshiaki Okuno, Masayuki Nishimura, Shigeru Tanaka | 2004-04-20 |
| 6718105 | Optical fiber | Takemi Hasegawa, Masayuki Nishimura | 2004-04-06 |
| 6711331 | Optical fiber | Shigeru Tanaka | 2004-03-23 |
| 6704135 | Operation mode switching apparatus, Raman amplifier and optical transmission system | Masayuki Nishimura | 2004-03-09 |
| 6701090 | Wavelength division multiplexing signal number monitoring apparatus and method | Hitoshi Hatayama | 2004-03-02 |
| 6684017 | Optical transmission line and optical transmission system including the same | Masao Tsukitani | 2004-01-27 |