Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4736078 | Method for processing vacuum switch and vacuum switch processed by the method | Koichi Yasuoka, Tohru Tamagawa, Eiji Kaneko, Mitsutaka Homma, Satoru Yanabu | 1988-04-05 |
| 4458121 | DC Circuit breaker | Satoru Yanabu, Tohoru Tamagawa, Eiji Kaneko | 1984-07-03 |
| 4442469 | DC Circuit breaker apparatus | Satoru Yanabu, Tohoru Tamagawa | 1984-04-10 |
| 4246458 | Vacuum interrupter | Satoru Yanabu, Tohoru Tamagawa, Shigeo Souma, Hiroyuki Okumura, Nobuyuki Takahashi | 1981-01-20 |