Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11465095 | Ventilation system | Shin Koizumi, Toshio Tanaka | 2022-10-11 |
| 10581227 | Discharge unit | Tatsumi Enokida, Kei Suzumura, Kiyoshi Kuroi, Toshio Tanaka | 2020-03-03 |
| 9468937 | Air purification device | Toshio Tanaka, Kenkichi Kagawa, Tatsumi Enokida, Kei Suzumura | 2016-10-18 |
| 8657937 | Dust collector | Kanji Motegi, Ryuuji Akiyama, Toshio Tanaka | 2014-02-25 |
| 8454733 | Air handling device | Toshio Tanaka, Kanji Motegi, Ryuji Akiyama | 2013-06-04 |
| 8454734 | Charging device, air handling device, method for charging, and method for handling air | Toshio Tanaka, Kanji Motegi, Ryuji Akiyama | 2013-06-04 |
| 8192535 | Dust collector | Toshio Tanaka, Kanji Motegi, Ryuji Akiyama, Tsunahiro Odo | 2012-06-05 |
| 8192536 | Dust collector | Toshio Tanaka, Kanji Motegi, Ryuji Akiyama, Tsunahiro Odo | 2012-06-05 |