Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884182 | Current source power converting apparatus with overvoltage protection | Takeki Ando, Kiyoshi Nakamura, Toshisuke Mine, Toshiaki Kurosawa, Masao Nakazato +1 more | 1989-11-28 |
| 4872532 | Signal transmission method and system in elevator equipment | Toshimitsu Tobita, Masachika Yamazaki, Masato Suzuki, Yuzo Morita, Toshiki Kajiyama +2 more | 1989-10-10 |
| 4870556 | Method and apparatus for controlling power converter | Seiya Shima, Toshiaki Kurosawa, Toshimitsu Tobita, Mitsuyuki Hombu, Nobuo Mitsui | 1989-09-26 |
| 4833586 | PWM control for power converter system utilizing pulse dropping at minimum pulse widths | Seiya Shima, Takeki Ando, Toshiaki Kurosawa, Nobuo Mitsui | 1989-05-23 |
| 4829416 | Apparatus for controlling power transducers of the pulse width modulation (PWM) control type | Seiya Shima, Sadao Hokari, Toshimitsu Tobita, Hideaki Takahashi, Shigeta Ueda | 1989-05-09 |