Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10983174 | Direct-current electricity leakage detection device and electricity leakage detection device | Tsuyoshi Ikushima, Naoki Fukuo | 2021-04-20 |
| 10809312 | Electric leakage detector | Tsuyoshi Ikushima, Naoki Fukuo | 2020-10-20 |
| 10396544 | Shutoff device | Eiji Iwami, Tsuyoshi Ikushima, Naoki Fukuo | 2019-08-27 |