Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7474536 | Audio sound quality enhancement apparatus and method | — | 2009-01-06 |
| 6765802 | Audio sound quality enhancement apparatus | — | 2004-07-20 |
| 5406470 | AC/DC converter | Siegfried Kern | 1995-04-11 |