Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5938490 | Outboard marine propulsion system | — | 1999-08-17 |
| 5027737 | Amphibious hydrofoil vehicle | Bryan Duffty, Hans F. Woehrmann | 1991-07-02 |
| 4993977 | Water jet propulsion module | — | 1991-02-19 |
| 4974539 | Integrated propulsion and hydrofoil system | Bryan Duffty, Christopher David Barry, Hans F. Woehrmann | 1990-12-04 |
| 4520691 | Hydrostatic reaction transmission | — | 1985-06-04 |
| 4464973 | Hydrostatic reaction transmission | — | 1984-08-14 |
| 4328601 | Inflatable bow | Howard H. Campbell | 1982-05-11 |