Robert Happel
7Patents
5h-index
3Co-inventors
52Inventor score
Filing activity: Apr 9, 1975 → Mar 8, 1989
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3958757A | Injection valve | Mechanical Engineering; Lighting; Heating | 36 | Expired |
| US4284043A | Method for operating an air-compressing auto-igniting internal combustion engine and injection valve suitable therefor | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4266727A | Double-needle injection-valve | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4224906A | Combustion engine with internal combustion | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4014301A | Externally ignited internal combustion engine with ignition chamber | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4119066A | Internal combustion engine | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4898136A | Mixture-compressing internal-combustion engine with a main combustion chamber and an auxiliary combustion chamber | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.