Ryouta Doi
10Patents
7h-index
17Co-inventors
63Inventor score
Filing activity: Aug 23, 1982 → Jan 21, 2003
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4562123A | Liquid fuel cell | Emerging Cross-Sectional Technologies | 58 | Expired |
| US6161378A | Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas internal combustion engine | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4612261A | Fuel cell battery using acidic electrolyte | Emerging Cross-Sectional Technologies | 33 | Expired |
| US6272848A | Exhaust gas cleaning apparatus and method for internal combustion engine | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US5968870A | Catalyst for purifying exhaust gas from internal combustion engine and purifying method thereof | Performing Operations; Transporting | 16 | Expired |
| US6397582B1 | Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engine | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5972828A | Method of manufacturing catalyst for cleaning exhaust gas released from internal combustion engine, and catalyst for the same | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6823659B2 | Moisture removal device and method thereof for internal combustion engine use exhaust gas cleaning device | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6596247B1 | Method for purifying exhaust gas from internal combustion engines | Performing Operations; Transporting | 2 | Expired |
| US7093432B2 | Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engine | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.