Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6775157 | Closed loop active EMI filter for reducing common or differential noise based on an error value | — | 2004-08-10 |
| 6744310 | Power amplifying device | — | 2004-06-01 |
| 6710653 | D-class power amplifier with electric power regeneration function | Tsutomu Kawamoto | 2004-03-23 |