Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5220137 | Engine exhaust muffler | Derrell Smith | 1993-06-15 |
| 5076393 | Engine exhaust muffler | Derrell Smith | 1991-12-31 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5220137 | Engine exhaust muffler | Derrell Smith | 1993-06-15 |
| 5076393 | Engine exhaust muffler | Derrell Smith | 1991-12-31 |