Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12313281 | Heat exchanger and heat exchange ventilator | Toshiaki Hayashi, Hajime Sotokawa | 2025-05-27 |
| D840008 | Drain pan for heat exchanger | Keiichi Yamamoto, Tomoki Hayashi | 2019-02-05 |
| D777891 | Air conditioner | Tsuyoshi Kubota, Keiichi Yamamoto, Tomoki Hayashi, Hiroyuki Masuda, Akihiro Hasegawa +1 more | 2017-01-31 |
| D761943 | Drain pan for heat exchanger | Keiichi Yamamoto, Tomoki Hayashi | 2016-07-19 |