Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6790550 | Water control for a fuel cell system | Tomonori Imamura, Toshiyuki Kawai, Kunio Okamoto | 2004-09-14 |
| 6569552 | Fuel cell system including fuel cell for generating electric energy by chemical reaction between hydrogen and oxygen | Naoto Hotta, Kunio Okamoto, Tadayoshi Terao, Kiyoshi Kawaguchi, Masanori Uehara | 2003-05-27 |