Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842559 | Position control system for a marine propulsion device | John M. Griffiths, Michael A. Karls | 1989-06-27 |
| 4836151 | Two cycle engine with turbulence generator at reed valves | John M. Griffiths, Robert J. Baumhardt | 1989-06-06 |
| 4836811 | Transom extension mounting assembly for outboard motors | John M. Griffiths, Neil A. Newman | 1989-06-06 |