Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10581227 | Discharge unit | Shunji Haruna, Kei Suzumura, Kiyoshi Kuroi, Toshio Tanaka | 2020-03-03 |
| 9468937 | Air purification device | Toshio Tanaka, Kenkichi Kagawa, Shunji Haruna, Kei Suzumura | 2016-10-18 |