Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9726773 | Subaqueous underground survey system and subaqueous underground survey method | Hiroaki OZASA, Fumio Sato, Shigeki Nagaya, Akio Yamanishi | 2017-08-08 |
| 7768698 | Raman amplifier and optical communication system | Toshiyuki Tokura, Katsuhiro Shimizu, Tasuku Fujieda, Ken'ichi Asakawa, Katsuyoshi Kawaguchi | 2010-08-03 |
| 7539413 | Observation apparatus and observation system | Hiroaki Munehira, Junichi Nakagawa, Toshiyuki Tokura, Kenichi Asakawa, Katsuyoshi Kawaguchi | 2009-05-26 |
| 7437070 | Submarine observation apparatus and submarine observation system | Tasuku Fujieda, Hideki Goto, Kenichi Asakawa, Katsuyoshi Kawaguchi | 2008-10-14 |