Tetsusyo Yamada
25Patents
13h-index
15Co-inventors
70Inventor score
Filing activity: Jul 26, 1982 → Oct 11, 1989
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4505807A | Oxygen sensor | Emerging Cross-Sectional Technologies | 72 | Expired |
| US4450065A | Oxygen sensor | Physics | 55 | Expired |
| US4498968A | Oxygen sensor | Physics | 44 | Expired |
| US4505806A | Oxygen sensor | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4578172A | Air/fuel ratio detector | Physics | 30 | Expired |
| US4722779A | Air/fuel ratio sensor | Physics | 29 | Expired |
| US4624770A | Air-fuel ratio sensor | Physics | 20 | Expired |
| US4578171A | Air/fuel ratio detector | Physics | 17 | Expired |
| US4753203A | Air/fuel ratio sensor apparatus for use with internal combustion engine | Physics | 16 | Expired |
| US4594139A | Air/fuel ratio detector | Physics | 16 | Expired |
| US4839018A | Air/fuel ratio detector | Physics | 15 | Expired |
| US4629549A | Oxygen sensor | Physics | 13 | Expired |
| US4591421A | Air/fuel ratio detector | Physics | 13 | Expired |
| US4615787A | Air/fuel ratio detector | Physics | 13 | Expired |
| US5064693A | Method of adjusting a gas sensor | Physics | 12 | Expired |
| US4806739A | Plate-like ceramic heater | Electricity | 12 | Expired |
| US5110442A | Reinforced electrolyte function elements | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4785150A | Plate-like alumina heater | Electricity | 7 | Expired |
| US4836906A | Air-fuel ratio sensor | Physics | 7 | Expired |
| US4722778A | Gas sensor with gas diffusion chamber between two platy solid electrolyte cells | Physics | 3 | Expired |
| US4935119A | Air/fuel ratio sensor | Physics | 3 | Expired |
| USH427H | Air/fuel ratio detector | General | 3 | Active |
| US4792387A | Air-fuel ratio detecting device | Physics | 2 | Expired |
| US5047137A | Solid electrolyte air/fuel ratio sensor with voltage control | Physics | 2 | Expired |
| US4840854A | Reinforced plate-like sintered bodies | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.