Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851622 | Puffer type gas-blast circuit breaker | Takashi Yonezawa | 1989-07-25 |
| 4791256 | Insulated nozzle for use in an interrupter | Takashi Yonezawa, Toshiaki Yoshizumi, Akiyoshi Onuma, Ichiro Yamasaki | 1988-12-13 |
| 4749831 | Dead tank type gas circuit breaker | Michiharu Okuno | 1988-06-07 |