Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10669173 | Ballast water treatment device and ballast water treatment method | Shigeki Fujiwara, Masanori Nagafuji, Yusuke Shimono | 2020-06-02 |
| 7776224 | Apparatus for treating ballast water and method for treating ballast water | Shigeki Fujiwara, Koji Fuchigami, Keisuke Nakahara, Masakuni Inoko, Sho Ishida | 2010-08-17 |
| 6497819 | Method and apparatus for treating waste water | Kei Baba, Toshiaki Tsubone, Tatsuo Takechi, Shinichi Endo | 2002-12-24 |
| 5231947 | Ship's rudder | Yoshikazu Kasahara | 1993-08-03 |