Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6481533 | Single inverter controller for elevator hoist and door motors | — | 2002-11-19 |
| 5564530 | Traction type elevator | Atsushi Iwakiri | 1996-10-15 |
| 5533595 | Traction-type elevator | Eiji Narumi | 1996-07-09 |
| 5247140 | Brake control system in elevator control apparatus | Koji Yamada, Hirofumi Sugiura | 1993-09-21 |
| 5105352 | Offset correction circuit of PWM inverter | Hirofumi Sugiura | 1992-04-14 |
| 5070290 | Alternating current motor control system with emergency control responsive to failure of power supply | Masayuki Mori | 1991-12-03 |
| 5070426 | Clipper circuit for power transistor circuit and inverter circuit utilizing the same | Yasutami Kito | 1991-12-03 |
| 5058710 | Elevator power source device | — | 1991-10-22 |
| 4994951 | PWM inverter control unit | Yasutami Kito | 1991-02-19 |
| 4870334 | Motor control apparatus | Yasutami Kito, Masayuki Mori | 1989-09-26 |