John M. Griffiths
40Patents
15h-index
21Co-inventors
81Inventor score
Filing activity: Jun 12, 1981 → Apr 13, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4872857A | Operation optimizing system for a marine drive unit | Performing Operations; Transporting | 73 | Expired |
| US5009621A | Torque splitting drive train mechanism for a dual counterrotating propeller marine drive system | Emerging Cross-Sectional Technologies | 59 | Expired |
| US4939660A | Fuel conserving cruise system for a marine drive unit | Emerging Cross-Sectional Technologies | 41 | Expired |
| US4861292A | Speed optimizing positioning system for a marine drive unit | Performing Operations; Transporting | 37 | Expired |
| US6352456B1 | Marine propulsion apparatus with adjustable tiller handle | Performing Operations; Transporting | 34 | Expired |
| US7185599B1 | Jet drive propulsion system for a pontoon boat | Performing Operations; Transporting | 31 | Expired |
| US6694955B1 | Marine engine with primary and secondary fuel reservoirs | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US7182033B1 | Self-contained marine propulsion system for a pontoon boat | Performing Operations; Transporting | 24 | Expired |
| US4836812A | Steering system for auxiliary marine engine | Performing Operations; Transporting | 24 | Expired |
| USD420565S | Equipment ring for use on scuba equipment | General | 21 | Expired |
| US6299496A | Exhaust control system for a marine vessel | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4383503A | Combustion chamber scavenging system | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4836151A | Two cycle engine with turbulence generator at reed valves | Emerging Cross-Sectional Technologies | 18 | Expired |
| US7267588B1 | Selectively lockable marine propulsion devices | Performing Operations; Transporting | 17 | Expired |
| US4842559A | Position control system for a marine propulsion device | Performing Operations; Transporting | 16 | Expired |
| US4872859A | Lift and latch apparatus for an outboard motor | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US7291048B1 | Actuator device for a marine propulsion transmission | Performing Operations; Transporting | 13 | Active |
| US6413131B1 | Air flow system for an outboard motor | Emerging Cross-Sectional Technologies | 13 | Expired |
| USD415013S | Backplate for use with a scuba tank | General | 12 | Expired |
| US6808432B1 | Marine propulsion device with cooling system cover | Performing Operations; Transporting | 11 | Expired |
| US5980158A | Buoyancy compensation device with restraining means | Performing Operations; Transporting | 11 | Expired |
| US6866022B1 | Throttle control handle with reduced required shifting force | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5832888A | Thermostatic override switch for an automatic choke in an internal combustion engine | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6960108B1 | Protective containment device for wires and hoses of an outboard motor | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6357048B2 | One-piece diver's garment | Performing Operations; Transporting | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.