Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4940271 | Engine lifting method and tool | — | 1990-07-10 |
| 4922749 | Engine crankshaft indexing method and tool | Paul A. Feyen, Wesley R. Martin | 1990-05-08 |
| 4875439 | Marine propulsion system with fuel line cooler | Steven L. Widmer, Gerald F. Neisen, Jeffrey P. Ruhnke, Brian S. Buchholz | 1989-10-24 |
| 4865004 | Marine propulsion system with fuel line cooler | Steven L. Widmer, Gerald F. Neisen, Jeffrey P. Ruhnke, Brian S. Buchholz | 1989-09-12 |
| 4768492 | Marine propulsion system with fuel line cooler | Steven L. Widmer, Gerald F. Neisen, Jeffrey P. Ruhnke, Brian S. Buchholz | 1988-09-06 |