Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863406 | Marine propulsion device with two piece propeller shaft assembly including spring clip for releasably preventing relative movement between propeller shaft pieces | Michael Freitag | 1989-09-05 |
| 4850910 | Counter-rotation transmission | Jeffery P. Higby, Kennedy K. McElroy, Jr., Arthur R. Ferguson, Michael Freitag, Donald K. Sullivan | 1989-07-25 |