Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4975800 | Contact abnormality detecting system | Akira Hashimoto, Yukio Kurosawa, Yoshiaki Inui, Tokio Yamagiwa | 1990-12-04 |
| 4442330 | Puffer type current interrupter | Shunji Sato, Takeshi Takahashi, Kunio Hirasawa | 1984-04-10 |