Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5650907 | Circuit breaker | Kazuhiro Ishii, Kouji Hirotsune, Kazushi Sato | 1997-07-22 |
| 5406128 | Multicircuit control apparatus and control method therefor | — | 1995-04-11 |
| 5225994 | Control and supervisory system for power distribution equipment | Hirohisa Mizuhara, Yasuhiro Ishii, Katsuya Sakai, Hiromitsu Takahashi | 1993-07-06 |
| D335488 | Electronic trip relay | Masakatsu Suzuki, Kazuhiro Ishii, Shingo Akita, Koji Hirotsune | 1993-05-11 |
| 5170309 | Four-pole circuit breaker | Kazuhiro Ishii, Kouji Hirotsune, Kazushi Sato | 1992-12-08 |
| 5086366 | Prealarm circuit breaker | Kazuhiro Ishii, Kouji Hirotsune, Kazushi Sato | 1992-02-04 |
| 4945329 | Tripping device with burning prevention switch | Kazuyoshi Sugihara | 1990-07-31 |