Erich Schiefer
5Patents
3h-index
5Co-inventors
46Inventor score
Filing activity: Dec 3, 1986 → Nov 25, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4771176A | Method for quantitative analysis of hydrocarbon | Physics | 42 | Expired |
| US4953390A | Method and a device for measuring the air/fuel ratio of an internal combustion engine | Physics | 26 | Expired |
| US6570655B1 | Process and apparatus for measuring the opacity in gases | Physics | 3 | Expired |
| US7222517B2 | Method for determining the characteristic properties of soot particles | Physics | 2 | Expired |
| US7637144B2 | Measuring device, preferably a test stand for engines and vehicles for analyzing exhaust gases of a combustion engine | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.