Keiichi Saji
11Patents
7h-index
21Co-inventors
66Inventor score
Filing activity: Apr 29, 1982 → Dec 26, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4993386A | Operation control system for internal combustion engine | Emerging Cross-Sectional Technologies | 138 | Expired |
| US4510036A | Limiting electric current type oxygen sensor with heater and limiting electric current type oxygen concentration detecting device using the same | Physics | 42 | Expired |
| US4626338A | Equipment for detecting oxygen concentration | Physics | 27 | Expired |
| US4472262A | Limiting electric current type oxygen concentration detector applied with temperature compensation | Physics | 23 | Expired |
| US4595485A | Limiting electric current type oxygen sensor | Physics | 21 | Expired |
| US5480535A | Thin film multilayered air/fuel ratio sensor | Physics | 14 | Expired |
| US4844788A | Wide-range air/fuel ratio sensor and detector using the same | Physics | 11 | Expired |
| US4576705A | Apparatus with polarographic sensor to detect concentrations of plurality of gas components | Physics | 7 | Expired |
| US7153412B2 | Electrodes, electrochemical elements, gas sensors, and gas measurement methods | Physics | 5 | Expired |
| US5814719A | Limiting current type oxygen sensor | Physics | 5 | Expired |
| US6607643B2 | NOx gas detecting apparatus | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.