John Campbell
6Patents
2h-index
7Co-inventors
40Inventor score
Filing activity: Apr 1, 1997 → Dec 15, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5818269A | Differential current mode driver | Electricity | 12 | Expired |
| US5864228A | Current mirror current source with current shunting circuit | Physics | 6 | Expired |
| US8752365B2 | Method for dosing an urea based reducing agent into a gas exhaust stream | Emerging Cross-Sectional Technologies | 2 | Active |
| US8756918B2 | Dosing module for dosing an urea based reducing agent into a gas exhaust stream | Emerging Cross-Sectional Technologies | 1 | Active |
| US9394821B2 | System for improving the purifying liquid evaporation in an axially symmetric dosing module for an SCR device | Emerging Cross-Sectional Technologies | 1 | Active |
| US9995194B2 | System for preventing the urea crystal formation within an exhaust gas after treatment system | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.