Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12313296 | Heat exchanger and water heater | Takeshi Ohigashi, Norihide Wada, Kengo Horiuchi, Naoya Shiotsu | 2025-05-27 |
| 12264818 | Premixing device and combustion device including the premixing device | Kyohei OGAWA | 2025-04-01 |
| 11060761 | Plate heat exchanger and water heater including same | Kazuhiro Nishimura, Kenichi Nakayama | 2021-07-13 |
| 8776829 | Valve apparatus and water heating apparatus | Makoto Hamada, Yoshihito Okitsu | 2014-07-15 |
| 6746236 | Combustion apparatus | Yasutaka Kuriyama, Takashi Hasegawa, Hidenori Hata, Masaaki Matsuda, Shingo Kimura +6 more | 2004-06-08 |