Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5696417 | Electromagnetic induction driving method and device | — | 1997-12-09 |
| 4580187 | A-C current limiting device | — | 1986-04-01 |
| 4575599 | Spiral arc circuit breaker | — | 1986-03-11 |
| 4567538 | Alternating current limiting apparatus | Hiroyuki Hirakawa, Hiroshi Maekawa | 1986-01-28 |
| 4560848 | Circuit breaker of spiral arc type | — | 1985-12-24 |
| 4523249 | Alternating current limiting apparatus | — | 1985-06-11 |
| 4475018 | Puffer type gas circuit breaker | Hiroshi Kakeyama | 1984-10-02 |
| 4459447 | Self extinguishing type gas circuit breaker | — | 1984-07-10 |
| 4450329 | Gas circuit breaker | Shigeru Yamaji, Chikato Ishitobi | 1984-05-22 |