Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6039866 | Fluidized bed filtering apparatus | Tetsuya Tanaka, Koichi Tsuzuki, Noriyo Nishijima, Fumitaka Handa | 2000-03-21 |
| 5893978 | Purifying method and purification system for lakes and marshes | Hiroaki Yoda, Toshio Masuda, Takashi Mizumori, Koichi Tsuzuki | 1999-04-13 |
| 4639146 | Thrust bearing | Masahiro Yoshioka, Hideki Izumi, Hiroshi Inouye, Eiichi Hazaki | 1987-01-27 |