Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11002462 | Heat-exchanging ventilation device, method for attaching heat exchanger, and method for detaching heat exchanger | Keishi Tsuda, Masaru Takada, Akira Hayashi | 2021-05-11 |
| 10907856 | Heat exchanger and heat exchange ventilator | Masaru Takada, Keishi Tsuda | 2021-02-02 |