Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12276421 | Collective exhaust system | Takahide Hasegawa | 2025-04-15 |
| 11639813 | Water heating apparatus and water heating system | Takahide Hasegawa | 2023-05-02 |
| 11391469 | Hot-water supply device | Takahide Hasegawa, Ryo Takahashi | 2022-07-19 |
| 11378283 | Hot water supply device | Takahide Hasegawa | 2022-07-05 |