Hisayo Douta
7Patents
6h-index
7Co-inventors
52Inventor score
Filing activity: Jan 9, 1991 → May 4, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6073440A | System for detecting deterioration of catalyst for purifying exhaust gas | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5479897A | Control apparatus for internal combustion engine | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US5390489A | Air-fuel ratio control system for internal combustion engine | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5343701A | Air-fuel ratio control system for internal combustion engine | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5473888A | Air-fuel ratio control system for internal combustion engine | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US6295807A | System for detecting deterioration of catalyst for purifying exhaust gas | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5216610A | Engine rotation speed control apparatus having auxiliary air controller | Mechanical Engineering; Lighting; Heating | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.