Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11872521 | Air purifying system | Katsuya Umemoto, Kouji Fukumoto, Tomoaki Umemura, Hideto Matsuyama, Eiji Kamio | 2024-01-16 |
| 11413573 | Air purifying system | Katsuya Umemoto, Teruo Kishimoto | 2022-08-16 |