Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4629664 | Liquid fuel cell | Saburo Yasukawa, Toshio Shimizu, Ryota DOI, Motoo Yamaguchi, Shuzou Iwaasa | 1986-12-16 |
| 4612261 | Fuel cell battery using acidic electrolyte | Toshio Shimizu, Ryouta Doi | 1986-09-16 |
| 4588660 | Fuel cell | Toshio Shimizu, Takanori Satoo, Ryota DOI, Motoo Yamaguchi, Yoshio Yoshioka | 1986-05-13 |
| 4562123 | Liquid fuel cell | Toshio Shimizu, Takanori Satou, Ryouta Doi, Motoo Yamaguchi | 1985-12-31 |
| 4537840 | Fuel cell using organic, high-molecular weight electrolyte | Toshio Shimizu, Ryota DOI, Yasuyuki Tsutsumi | 1985-08-27 |