Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6327060 | Optical transmission system, optically branching apparatus and optical signal processing apparatus | Toshio Kawazawa, Koji Goto | 2001-12-04 |
| 6115156 | Demultiplexer device for wavelength-division multiplexed optical fiber communication | Toshio Kawazawa, Koji Goto, Hiroharu Wakabayashi | 2000-09-05 |
| 5978122 | Noise suppression method for wavelength division multiplexing transmission system | Toshio Kawazawa, Koji Goto, Haruo Abe, Masando Tanaka | 1999-11-02 |