John E. Letcher
7Patents
7h-index
12Co-inventors
49Inventor score
Filing activity: Aug 24, 1992 → Mar 5, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5255661A | Method for determining fuel composition using oxygen sensor feedback control | Emerging Cross-Sectional Technologies | 41 | Expired |
| US5606121A | Method of testing an evaporative emission control system | Physics | 34 | Expired |
| US5651350A | Method of leak detection for an evaporative emission control system | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US5715799A | Method of leak detection during low engine vacuum for an evaporative emission control system | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US5520162A | Boiloff for a flexible fuel compensation system | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5415145A | Start fuel decay for a flexible fuel compensation system | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5651349A | Purge system flow monitor and method | Mechanical Engineering; Lighting; Heating | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.