Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872528 | Muffler construction | Gary D. Goplen | 1989-10-10 |
| 4712643 | Particulate trap exhaust muffler | Gary D. Goplen | 1987-12-15 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872528 | Muffler construction | Gary D. Goplen | 1989-10-10 |
| 4712643 | Particulate trap exhaust muffler | Gary D. Goplen | 1987-12-15 |