Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10676858 | Condenser and cleaning device | Kazuhiko Katsumata, Osamu Sakamoto, Takahiro Nagata | 2020-06-09 |
| 10323315 | Carburizing device | Kazuhiko Katsumata, Osamu Sakamoto, Takahiro Nagata | 2019-06-18 |
| 10118204 | Cleaning apparatus | Kazuhiko Katsumata, Osamu Sakamoto, Takahiro Nagata | 2018-11-06 |
| 9926621 | Carburizing device | Kazuhiko Katsumata, Osamu Sakamoto, Takahiro Nagata | 2018-03-27 |
| 9555450 | Vacuum cleaning apparatus and vacuum cleaning method | Noboru Hiramoto, Hiroyuki Konishi | 2017-01-31 |