Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6829360 | Method and apparatus for expanding band of audio signal | Naoki Ejima, Akira Sobajima | 2004-12-07 |
| 6703770 | Spark plug attachment structure and spark plug therefor | Akira Suzuki, Takahiro Suzuki, Kazumi Kawamura | 2004-03-09 |