Masaharu Sumiyoshi
53Patents
16h-index
30Co-inventors
80Inventor score
Filing activity: Jan 17, 1974 → Apr 9, 1990
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4230072A | Internal combustion engine with a methanol reforming system | Emerging Cross-Sectional Technologies | 60 | Expired |
| US4721253A | Intermittent type swirl injection nozzle | Emerging Cross-Sectional Technologies | 45 | Expired |
| US4047507A | Fuel economizing system | Mechanical Engineering; Lighting; Heating | 43 | Expired |
| US4106448A | Internal combustion engine and method of operation | Emerging Cross-Sectional Technologies | 34 | Expired |
| US4938306A | Four-wheel-drive vehicle having a torque transmission coupling for always transmitting the torque | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4002151A | Diesel engine and method for improving the performance thereof | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4565106A | Gear transmission mechanism with multiple layshafts | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4909371A | Four wheel driving power | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US4322800A | Method of reducing fuel consumption rate in internal combustion engines | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4177778A | Carburetors with heating device | Emerging Cross-Sectional Technologies | 24 | Expired |
| US3982504A | Internal combustion engine | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4644821A | Continuously variable vehicular transmission for reducing transmission torque applied to belt-type continuously variable transmission mechanism | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4034733A | Internal combustion engine | Emerging Cross-Sectional Technologies | 18 | Expired |
| US3974818A | Internal combustion engine | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4256063A | Intake system of a multi-cylinder internal combustion engine | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4086885A | Carburetor for stratified internal combustion engine | Emerging Cross-Sectional Technologies | 16 | Expired |
| US3955538A | Fuel reforming system for an internal combustion engine | Emerging Cross-Sectional Technologies | 15 | Expired |
| US3980052A | Fuel supply installation for internal combustion engines | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4653694A | Intermittent type swirl injection nozzle | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4128081A | Torch ignition type internal combustion engine | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4089310A | Internal combustion engine providing improved exhaust-gas purification | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US4174690A | Air-fuel ratio control device | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4232517A | Exhaust gas control actuator | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4143627A | Internal combustion engine | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4336776A | Swirl-inducing apparatus for internal combustion engines | Emerging Cross-Sectional Technologies | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.