Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878928 | Apparatus for increasing regenerative filter heating element temperature | Wayner M. Wagner | 1989-11-07 |
| 4851015 | Muffler apparatus with filter trap and method of use | Wayne M. Wagner, Edward A. Steinbrueck, Bruce Hoppenstedt | 1989-07-25 |
| 4832661 | Apparatus and method for maintaining alternator output above predetermined levels | Wayne M. Wagner | 1989-05-23 |