Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7768698 | Raman amplifier and optical communication system | Toshiyuki Tokura, Katsuhiro Shimizu, Tasuku Fujieda, Ken'ichi Asakawa, Hitoshi Mikada | 2010-08-03 |
| 7539413 | Observation apparatus and observation system | Hiroaki Munehira, Junichi Nakagawa, Toshiyuki Tokura, Kenichi Asakawa, Hitoshi Mikada | 2009-05-26 |
| 7437070 | Submarine observation apparatus and submarine observation system | Tasuku Fujieda, Hideki Goto, Kenichi Asakawa, Hitoshi Mikada | 2008-10-14 |
| 7276811 | Submarine power feeding system having submarine feeding cables and power feeding branching devices | Jun Muramatsu, Kenichi Asakawa | 2007-10-02 |
| 7166933 | Submarine power feeding branching device for submarine power feeding system having submarine feeding cables arranged in mesh pattern | Jun Muramatsu, Kenichi Asakawa | 2007-01-23 |
| 7102257 | Submarine cable power feeding system | Jun Muramatsu, Kenichi Asakawa | 2006-09-05 |