Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5347230 | Amplification circuit | — | 1994-09-13 |
| 5317494 | Power supply circuit utilizing voltage and current resonance for reducing switching loss | — | 1994-05-31 |
| 5297211 | Acoustic device for custom installation | — | 1994-03-22 |
| 5280543 | Acoustic apparatus and driving apparatus constituting the same | Kenji Yokoyama | 1994-01-18 |