Noboru Nagai
12Patents
8h-index
12Co-inventors
65Inventor score
Filing activity: Jun 8, 1988 → Dec 17, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5139107A | Exhaust muffler for internal combustion engines | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US5373119A | Exhaust muffler for internal combustion engine | Emerging Cross-Sectional Technologies | 22 | Expired |
| US6786187B2 | Internal combustion engine | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US6394060B2 | Lubricating method and device of internal combustion engine | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US6202613A | Four-stroke cycle internal combustion engine | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US5206467A | Muffler with a catalyst | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4872308A | Exhaust device for working machine | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6283084A | Four-stroke cycle internal combustion engine | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6332440A | Four-stroke cycle internal combustion engine | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5881687A | Two-stroke internal combustion engine | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US5826567A | Two-stroke internal combustion engine | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6546907B2 | Four-stroke cycle internal combustion engine | Mechanical Engineering; Lighting; Heating | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.