Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5700172 | Submerged marine exhaust system | Douglas A. Keehn, Jr. | 1997-12-23 |
| 5570730 | Spill resistant fuel cap and ventilation system | Douglas A. Keehn, Jr., William W. Powell | 1996-11-05 |
| 5505644 | Submerged marine exhaust system | Douglas A. Keehn, Jr., William W. Powell, John R. Hamm | 1996-04-09 |
| D358574 | Jet boat hull | Bruce F. Thompson | 1995-05-23 |
| D357223 | Jet boat | Bruce F. Thompson | 1995-04-11 |
| D330005 | Ski boat | Bruce F. Thompson | 1992-10-06 |
| 4861294 | Shaft pressure ring and method for lubricating shaft log seals | — | 1989-08-29 |