Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4306969 | Apparatus for sewage purification | Takaai Tamura, Wataru Ito, Norihiko Fujita, Naoki Negishi, Yukihiko Tamaki | 1981-12-22 |
| 4219424 | Apparatus for enriching oxygen contained in water | Takaaki Tamura, Wataru Ito, Norihiko Fujita, Naoki Negishi | 1980-08-26 |