Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6831777 | Optical transmission system and method | Takao Naito | 2004-12-14 |
| 6791744 | Raman amplification optical fiber, optical fiber coil, raman amplifier, and optical communication system | Eisuke Sasaoka, Motoki Kakui, Masashi Onishi, Takao Naito | 2004-09-14 |
| 6724167 | Numerical control drive system | — | 2004-04-20 |
| 6709670 | Aminoethanesulfonic acid-containing preparations | Yasushi Furuta | 2004-03-23 |
| 6681082 | Wavelength division multiplexing optical transmission system, optical amplifier and dispersion compensator | Takao Naito | 2004-01-20 |