Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10707500 | Fuel cell system | — | 2020-07-07 |
| 8893472 | Cogeneration apparatus | Koichi Oka, Daiki Kamiyama, Kosuke Yamana, Nobuyuki Sasaki | 2014-11-25 |
| 8679212 | Air cleaner device | Atsumu Naoi | 2014-03-25 |
| 8418753 | Heat exchange tube | Isao Hirokawa, Tetsuaki Nakayama, Yasuyuki Watanabe, Toshihiro Kondo, Atsumu Naoi | 2013-04-16 |
| 6976892 | Water-cooled vertical engine, outboard motor equipped with water-cooled vertical engine, and outboard motor | Hiroki Tawa, Tatsuya Kuroda | 2005-12-20 |
| 6921306 | Water-cooled vertical engine and outboard motor equipped therewith | Hiroki Tawa | 2005-07-26 |