Shinya Hirota
122Patents
26h-index
91Co-inventors
93Inventor score
Filing activity: Sep 6, 1988 → Jun 24, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5974791A | Exhaust gas purification device for an internal combustion engine | Emerging Cross-Sectional Technologies | 199 | Expired |
| US5473887A | Exhaust purification device of internal combustion engine | Emerging Cross-Sectional Technologies | 198 | Expired |
| US5201802A | Exhaust gas purification system for an internal combustion engine | Emerging Cross-Sectional Technologies | 134 | Expired |
| US5437153A | Exhaust purification device of internal combustion engine | Emerging Cross-Sectional Technologies | 131 | Expired |
| US6058700A | Device for purifying exhaust gas of engine | Mechanical Engineering; Lighting; Heating | 123 | Expired |
| US5189876A | Exhaust gas purification system for an internal combustion engine | Emerging Cross-Sectional Technologies | 100 | Expired |
| US6502391B1 | Exhaust emission control device of internal combustion engine | Emerging Cross-Sectional Technologies | 94 | Expired |
| US5996338A | Exhaust gas purifying device for engine | Emerging Cross-Sectional Technologies | 87 | Expired |
| US5406790A | Exhaust gas purification device for an engine | Emerging Cross-Sectional Technologies | 80 | Expired |
| US6178743A | Device for reactivating catalyst of engine | Emerging Cross-Sectional Technologies | 60 | Expired |
| US5388406A | NOx decreasing apparatus for an internal combustion engine | Emerging Cross-Sectional Technologies | 58 | Expired |
| US6233927A | Exhaust gas purification device | Emerging Cross-Sectional Technologies | 53 | Expired |
| US5839275A | Fuel injection control device for a direct injection type engine | Emerging Cross-Sectional Technologies | 51 | Expired |
| US6192675A | Exhaust gas purification device for an internal combustion engine | Emerging Cross-Sectional Technologies | 51 | Expired |
| US5471836A | Exhaust purification device of internal combustion engine | Emerging Cross-Sectional Technologies | 47 | Expired |
| US6233925A | Exhaust discharge control device for internal combustion engine | Mechanical Engineering; Lighting; Heating | 41 | Expired |
| US5884476A | Exhaust gas purifying device for engine | Emerging Cross-Sectional Technologies | 36 | Expired |
| US6367246B1 | Exhaust gas purification device for internal combustion engine | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5934072A | Exhaust gas purifying device for engine | Emerging Cross-Sectional Technologies | 33 | Expired |
| US6212885A | Exhaust emission control system of internal combustion engine | Emerging Cross-Sectional Technologies | 29 | Expired |
| US7703275B2 | Exhaust purification device of compression ignition type internal combustion engine | Mechanical Engineering; Lighting; Heating | 29 | Active |
| US6546721B2 | Exhaust gas purification device | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6823664B2 | Exhaust gas purification device | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US6834496B2 | Exhaust gas purifying apparatus for internal combustion engine and control method thereof | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4907305A | Bubbling bathtub system | Emerging Cross-Sectional Technologies | 26 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.