Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6699577 | Air purification-functioning road and method for purifying polluted air over road | Hiromi Koga | 2004-03-02 |
| 4985149 | Anaerobic digestion method | Yoshio Ohshima, Tsunekazu Watanabe, Keizaburo Watanabe, Masayoshi Kitazume, Yukihiro Tomita | 1991-01-15 |