Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6904240 | Optical multiplexing apparatus and optical multiplexing method | Katsuhiko Suga | 2005-06-07 |
| 6868200 | Wavelength division multiplexing optical transmission apparatus | Koichi Kimotsuki, Kazunori Hayami, Tatsuo Nagayoshi | 2005-03-15 |
| 6118561 | Wavelength division multiplexing optical transmitter and wavelength division multiplexing-demultiplexing optical transmission-reception system | — | 2000-09-12 |
| 5581397 | Optical-fiber amplifier | Kenji Ohta | 1996-12-03 |
| 5296957 | Optical repeater having loop-back function used in transmission system | Masaaki Takahashi, Kazuya Amaki, Katsumi Kikawa, Mitsushi Nitta | 1994-03-22 |