Roger E. Koepsel
21Patents
10h-index
20Co-inventors
75Inventor score
Filing activity: Dec 26, 1979 → Apr 10, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4897061A | Gearcase exhaust vent for a marine propulsion system | Performing Operations; Transporting | 25 | Expired |
| US7637722B1 | Marine propeller | Performing Operations; Transporting | 23 | Active |
| US7086836B1 | Dual rate torque transmitting device for a marine propeller | Performing Operations; Transporting | 19 | Expired |
| US4331429A | Symmetrical propeller | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US5236310A | Marine propeller with performance pitch, including five blade version | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5290147A | Variable pitch marine propeller with shift biasing and synchronizing mechanism | Performing Operations; Transporting | 15 | Expired |
| US6340290B1 | Controllable pitch propeller with a fail safe increased pitch movement | Performing Operations; Transporting | 15 | Expired |
| US5104292A | Marine propeller with performance pitch, including five blade version | Emerging Cross-Sectional Technologies | 14 | Expired |
| USD319210S | Five blade marine propeller | General | 13 | Expired |
| US5791950A | Twin propeller marine propulsion unit | Performing Operations; Transporting | 13 | Expired |
| US5219272A | Variable pitch marine propeller with hydrodynamic shifting | Performing Operations; Transporting | 10 | Expired |
| US5902160A | Twin propeller marine propulsion unit | Performing Operations; Transporting | 10 | Expired |
| US6068529A | Marine propulsion unit with dual water inlet structure | Performing Operations; Transporting | 6 | Expired |
| US9745948B1 | Marine propeller and method of design thereof | Performing Operations; Transporting | 5 | Active |
| US4789303A | Marine propeller carry handle and emergency spare kit | Performing Operations; Transporting | 4 | Expired |
| US4925369A | Easily removed marine propeller | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US11459074B1 | Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation | Emerging Cross-Sectional Technologies | 3 | Active |
| US4993151A | Method of making an easily removed marine propeller | Emerging Cross-Sectional Technologies | 3 | Expired |
| US11713102B1 | Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation | Emerging Cross-Sectional Technologies | 1 | Active |
| US12391353B1 | Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation | Emerging Cross-Sectional Technologies | 0 | Active |
| US11981411B1 | Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.