Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864163 | Method for detecting input AC voltage | Fumiaki Nakao, Toshihiro Shimizu | 1989-09-05 |
| 4845607 | Dual input voltage power source for selectively switching between voltage doubler rectification and full-wave rectification functions | Fumiaki Nakao | 1989-07-04 |