Roger E. Doerfler
5Patents
3h-index
3Co-inventors
42Inventor score
Filing activity: Oct 24, 1974 → Dec 21, 1978
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3937523A | Proportioning brake control device with bypass | Performing Operations; Transporting | 13 | Expired |
| US4221437A | Brake proportioning apparatus | Performing Operations; Transporting | 4 | Expired |
| US4068900A | Blend back proportioning brake control apparatus | Performing Operations; Transporting | 4 | Expired |
| US3985986A | Differential pressure warning switch | Electricity | 3 | Expired |
| US3980345A | Metering and proportioning valve mechanism | Performing Operations; Transporting | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.