Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6158546 | Straight through muffler with conically-ended output passage | Roger D. Hanson | 2000-12-12 |
| 5783782 | Multi-chamber muffler with selective sound absorbent material placement | Eric Pekrul, Thomas Philip William Turner | 1998-07-21 |
| 4756383 | Muffler with adjustable bushing | — | 1988-07-12 |
| 4192401 | Complete louver flow muffler | Don A. Deaver | 1980-03-11 |