Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867768 | Muffler apparatus with filter trap and method of use | Wayne M. Wagner | 1989-09-19 |
| 4851015 | Muffler apparatus with filter trap and method of use | Wayne M. Wagner, Douglas E. Flemming, Edward A. Steinbrueck | 1989-07-25 |