Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12078377 | Ventilator that detects indoor and outdoor CO2 concentrations and ventilation control method | Keiji Kameishi, Hidekazu Hirai | 2024-09-03 |
| 11287149 | Heat exchange ventilator | Masaki Morikawa | 2022-03-29 |
| 10928093 | Heat exchange ventilator | Kohei Matsumoto | 2021-02-23 |
| 10907655 | Multiblade fan | Kenichi Sakoda, Kazuki Okamoto, Hitoshi Kikuchi | 2021-02-02 |