Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7768698 | Raman amplifier and optical communication system | Toshiyuki Tokura, Katsuhiro Shimizu, Ken'ichi Asakawa, Hitoshi Mikada, Katsuyoshi Kawaguchi | 2010-08-03 |
| 7437070 | Submarine observation apparatus and submarine observation system | Hideki Goto, Kenichi Asakawa, Hitoshi Mikada, Katsuyoshi Kawaguchi | 2008-10-14 |