Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6342791 | Diode defect detecting device | Kinya Ichikawa, Koichiro Kurata, Suteo Fujino, Takatomo Izume, Yasuo Sakata | 2002-01-29 |
| 6107784 | System interconnection protective device for non-utility generation equipment | Shigeo Nomiya, Toyokuni Katoh | 2000-08-22 |
| 5965038 | Control equipment for resistance welding machine | Yoshihito Nomura, Tatsuaki Ambo, Saburou Souma | 1999-10-12 |
| 5844193 | Control equipment for resistance welding machine | Yoshihito Nomura, Tatsuaki Ambo, Saburo Souma | 1998-12-01 |
| 5493485 | Protection device for stopping operation of an inverter | — | 1996-02-20 |
| 5485341 | Power transistor overcurrent protection circuit | Makoto Hideshima | 1996-01-16 |
| 5446365 | Method and apparatus for controlling a battery car | Yoshihito Nomura, Koji Endo | 1995-08-29 |
| 5123746 | Bridge type power converter with improved efficiency | — | 1992-06-23 |
| 4827151 | Uninterruptible power supply utilizing a synchronized chopper for power factor improvement | — | 1989-05-02 |
| 4748550 | Pulse width modulator used for a power converter with a transformer | — | 1988-05-31 |
| 4721869 | Protection circuit for an insulated gate bipolar transistor utilizing a two-step turn off | — | 1988-01-26 |
| 4719531 | Overcurrent protective circuit for modulated-conductivity type MOSFET | Yoshihiro Yamaguchi, Akio Nakagawa | 1988-01-12 |
| 4646222 | Inverter provided with an overvoltage clamping circuit | Kazushi Ichimura, Tatsuaki Ambo | 1987-02-24 |
| 4597037 | Control system for a voltage-type inverter | — | 1986-06-24 |
| 4546422 | Control system for a voltage-type inverter | — | 1985-10-08 |
| 4499363 | DC Power source | Takatomo Izume | 1985-02-12 |
| 4445167 | Inverter system | — | 1984-04-24 |
| 4419559 | Resistive welder having a controlled output voltage unaffected by secondary circuit disconnection | Takatomo Izume | 1983-12-06 |
| 4403280 | Commutation control device for current type inverters | — | 1983-09-06 |
| 4364109 | Control device of inverters | Isami Ugai | 1982-12-14 |
| 4314189 | Device for controlling the commutating angle of an inverter device | Takashi Morishita, Koki Hasegawa | 1982-02-02 |
| 4309751 | Method and apparatus for controlling current type inverters | — | 1982-01-05 |
| 4263541 | Field control system for controlling induction machines | — | 1981-04-21 |
| 4260948 | Method and apparatus for controlling electric valves in AC power supply | — | 1981-04-07 |
| 4236201 | Inverter device | — | 1980-11-25 |