Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875439 | Marine propulsion system with fuel line cooler | Steven L. Widmer, Jeffrey P. Ruhnke, Thomas J. Steffes, Brian S. Buchholz | 1989-10-24 |
| 4865004 | Marine propulsion system with fuel line cooler | Steven L. Widmer, Jeffrey P. Ruhnke, Thomas J. Steffes, Brian S. Buchholz | 1989-09-12 |