Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6733352 | Electronically controlled cooling system for a marine propulsion engine | David J. Belter, Steve Wynveen, Troy J. Kollmann | 2004-05-11 |
| 6478543 | Torque transmitting device for mounting a propeller to a propeller shaft of a marine propulsion system | John A. Tuchscherer, Daniel J. Schlagenhaft, Robert B. Weronke, Douglas A. Kiesling, Mitesh B. Sheth +3 more | 2002-11-12 |
| 6146223 | Marine propulsion unit with water inlets in all quadrants of the front portion of its torpedo-shape gearcase | Robert B. Weronke, Jeffrey J. Andrews | 2000-11-14 |
| 6068529 | Marine propulsion unit with dual water inlet structure | Robert B. Weronke, Roger E. Koepsel, Donald F. Harry | 2000-05-30 |
| 5902160 | Twin propeller marine propulsion unit | Robert B. Weronke, Roger E. Koepsel, Donald F. Harry | 1999-05-11 |
| 5791950 | Twin propeller marine propulsion unit | Robert B. Weronke, Roger E. Koepsel, Donald F. Harry | 1998-08-11 |
| 5660536 | High capacity simplified sea water pump | Matthew W. Jaeger, George E. Brown, Darrin L. Doty, Bruce A. Schroeder | 1997-08-26 |
| 5484264 | Torsionally twisting propeller drive sleeve and adapter | Daniel Lindgren | 1996-01-16 |
| 5470263 | Method and apparatus for improving reverse thrust of a marine drive | John M. Griffiths, David A. Gussert | 1995-11-28 |
| 5415575 | Marine drive propeller clutch | — | 1995-05-16 |
| 5322416 | Torsionally twisting propeller drive sleeve | Daniel Lindgren | 1994-06-21 |
| 5304079 | Supplemental remote mounted marine engine cooling system | — | 1994-04-19 |
| 5290147 | Variable pitch marine propeller with shift biasing and synchronizing mechanism | Roger E. Koepsel, Ronald M. Steiner | 1994-03-01 |
| 5263389 | Torque rated floating marine propeller wrench | Michael E. Frazzell | 1993-11-23 |
| 5244348 | Propeller drive sleeve | Daniel Lindgren | 1993-09-14 |
| 5219272 | Variable pitch marine propeller with hydrodynamic shifting | Ronald M. Steiner, Roger E. Koepsel | 1993-06-15 |
| 5022875 | Marine propeller locking tab washer | — | 1991-06-11 |
| 4925412 | Marine drive weed deflector | — | 1990-05-15 |
| 4842559 | Position control system for a marine propulsion device | John J. Litjens, John M. Griffiths | 1989-06-27 |
| 4832639 | Marine drive with air trap in auxiliary water inlet | James C. Dutcher | 1989-05-23 |
| 4832640 | Marine gearcase water inlet divider | — | 1989-05-23 |
| 4790783 | Marine propulsion combination with improved cooling | — | 1988-12-13 |
| 4781632 | Anti-ventilation plate | John J. Litjens, Michael E. Frazzell, Ronald M. Steiner, William P. Lang | 1988-11-01 |
| 4752257 | Cooling water intake with increased flow | William P. Lang | 1988-06-21 |
| 4636175 | Water inlet for outboard propulsion unit | Michael E. Frazzell | 1987-01-13 |