Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862313 | Driving apparatus for DC circuit breakers | Tatsuji Shirouzu, Tatsuo Takahashi, Motoo Sato | 1989-08-29 |
| 4805062 | DC circuit breaker and method of commutation thereof | Tatsuji Shirouzu, Masatoshi Morita | 1989-02-14 |