Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4920328 | Material for resistor body and non-linear resistor made thereof | Masahiko Hayashi, Naoto Teshima | 1990-04-24 |
| RE32440 | Vacuum circuit interrupter | Takahumi Hashimoto | 1987-06-16 |
| 4306128 | Vacuum circuit interrupter | Takahumi Hashimoto | 1981-12-15 |