Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6520286 | Silencer and a method of operating a vehicle | Svend Frederiksen, Lars Frederiksen, Spencer C. Sorenson | 2003-02-18 |
| 6332510 | Gas flow silencer | Svend Frederiksen | 2001-12-25 |