Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6771778 | Method and signal processing device for converting stereo signals for headphone listening | — | 2004-08-03 |
| 6760447 | Sound recording and reproduction systems | Philip Nelson, Hareo Hamada | 2004-07-06 |