Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6702584 | Karaoke device with built-in microphone and microphone therefor | Kunihiro Tanaka | 2004-03-09 |
| 6703551 | Musical scale recognition method and apparatus thereof | Shuhei Kato | 2004-03-09 |