Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11774114 | Air treatment device | Hidekazu Tanaka, Ryuuji Akiyama | 2023-10-03 |
| 11384957 | Drain pan, drain pan unit, and air conditioner | Ryuuji Akiyama | 2022-07-12 |
| 11318478 | Electric discharge device and air purifying device | Kiyoshi Kuroi | 2022-05-03 |
| 10581227 | Discharge unit | Shunji Haruna, Tatsumi Enokida, Kiyoshi Kuroi, Toshio Tanaka | 2020-03-03 |
| 9468937 | Air purification device | Toshio Tanaka, Kenkichi Kagawa, Shunji Haruna, Tatsumi Enokida | 2016-10-18 |