Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878163 | Pulse width modulated inverter with high-to-low frequency output converter | Ikuo Yamato, Norikazu Tokunaga, Yasuo Matsuda | 1989-10-31 |
| 4866589 | Voltage resonance type switching power source apparatus | Masayoshi Satoo, Norikazu Tokunaga, Teruaki Odaka, Yasuo Matsuda | 1989-09-12 |
| 4855887 | Current and frequency converter having means to reduce switching losses | Ikuo Yamato, Norikazu Tokunaga, Yasuo Matsuda | 1989-08-08 |