Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5241255 | Failure detector for regeneration power absorbing means | Kenji Oshima | 1993-08-31 |
| 5130617 | Inverter control device for driving an elevator | Kenji Oshima | 1992-07-14 |
| 5070426 | Clipper circuit for power transistor circuit and inverter circuit utilizing the same | Masao Iwasa | 1991-12-03 |
| 4995478 | Start compensation device for elevators | Kenji Oshima | 1991-02-26 |
| 4994951 | PWM inverter control unit | Masao Iwasa | 1991-02-19 |
| 4987320 | Multiphase multiplier | Kenji Oshima | 1991-01-22 |
| 4982816 | Speed control system for elevators | Kazuhiko Doi | 1991-01-08 |
| 4902954 | Alternating current motor control apparatus | Kenji Oshima | 1990-02-20 |
| 4903187 | Control for variable frequency drive | Kazuhiko Doi | 1990-02-20 |
| 4870334 | Motor control apparatus | Masao Iwasa, Masayuki Mori | 1989-09-26 |
| 4734634 | Method and system for reconnecting inverter to rotating motors | Kuniake Yasukawa | 1988-03-29 |
| 4607205 | Method and system for reconnecting inverter to rotating motors | Kuniake Yasukawa | 1986-08-19 |