Keith E. Lawrence
28Patents
12h-index
50Co-inventors
84Inventor score
Filing activity: Sep 10, 1981 → Aug 1, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6216458A | Exhaust gas recirculation system | Emerging Cross-Sectional Technologies | 65 | Expired |
| US6769635B2 | Mixed mode fuel injector with individually moveable needle valve members | Mechanical Engineering; Lighting; Heating | 52 | Expired |
| US4429587A | Attitude insensitive lubrication systems | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5237976A | Engine combustion system | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| US6427671B1 | Exhaust gas recirculation mixer apparatus and method | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5765534A | Loading absorbing jumper tube assembly | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US6230695A | Exhaust gas recirculation system | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5499615A | Direct injection propane fuel system for diesel engine applications | Emerging Cross-Sectional Technologies | 22 | Expired |
| US6422217B1 | Back pressure valve drive EGR system | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US6237336A | Exhaust gas recirculation system in an internal combustion engine and method of using same | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US6843434B2 | Dual mode fuel injector with one piece needle valve member | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US6945475B2 | Dual mode fuel injection system and fuel injector for same | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US7134615B2 | Nozzle insert for mixed mode fuel injector | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US5564699A | Side and gap sealed oil ring | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US7032566B2 | Fuel injector nozzle for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6769392B2 | Variable valve timing in a homogenous charge compression ignition engine | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5131316A | Autoloading apparatus for tank cannon | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5845852A | Direct operated check injector | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5603512A | Side and gap sealed oil ring | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US6192686A | Exhaust gas recirculation system | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US6185939A | Exhaust gas recirculation system | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7370613B2 | Eccentric crank variable compression ratio mechanism | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US7444980B2 | Fuel injector nozzle for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US7909271B2 | Fuel injector nozzle for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US7055469B2 | Combustion engine variable compression ratio apparatus and method | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.