Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6650552 | Switching power supply unit with series connected converter circuits | Masakazu Takagi, Junichi Yamamoto, Katsuhiko Shimizu | 2003-11-18 |
| 6535407 | DC/DC converter having a piezoelectric transformer and rectification-smoothing circuit | — | 2003-03-18 |