Shigeki Nakayama
75Patents
12h-index
111Co-inventors
87Inventor score
Filing activity: Nov 24, 1981 → May 25, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5323567A | Plant cultivating apparatus | Emerging Cross-Sectional Technologies | 40 | Expired |
| US7281368B2 | Nox discharge quantity estimation method for internal combustion engine | Emerging Cross-Sectional Technologies | 30 | Expired |
| US7383118B2 | Control apparatus for internal combustion engine | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4453953A | Intermittent ozone feeding apparatus | Chemistry; Metallurgy | 21 | Expired |
| US7848871B2 | Gas-mixture-state estimation apparatus for internal combustion engine and emission-generation-amount estimation apparatus | Emerging Cross-Sectional Technologies | 20 | Active |
| US4552659A | Apparatus for elimination of biofouling | Chemistry; Metallurgy | 20 | Expired |
| US5888271A | Ozone storing method and ozone storage system | Performing Operations; Transporting | 19 | Expired |
| US7337766B2 | Gas-mixture-ignition-time estimation apparatus for internal combustion engine, and control apparatus for internal combustion engine | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4817332A | Method of enhancing plant growth and apparatus for performing the same | Emerging Cross-Sectional Technologies | 18 | Expired |
| US6214240A | Method for ozone treatment using a mixture of ozone and hydrogen peroxide | Chemistry; Metallurgy | 18 | Expired |
| US8196404B2 | Exhaust gas recirculation system for internal combustion engine and method for controlling the same | Emerging Cross-Sectional Technologies | 16 | Active |
| US4617755A | Apparatus for plant cultivation | Emerging Cross-Sectional Technologies | 14 | Expired |
| US8220443B2 | EGR system for internal combustion engine and method for controlling the same | Emerging Cross-Sectional Technologies | 12 | Active |
| US4517849A | Sampling system for water quality sensors | Physics | 11 | Expired |
| US6928361B2 | Control apparatus for motor vehicle and storage medium | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US8453446B2 | Exhaust gas control system for internal combustion engine and method for controlling the same | Emerging Cross-Sectional Technologies | 9 | Active |
| US6086772A | Method and apparatus for preventing biofouling in cooling water system | Chemistry; Metallurgy | 8 | Expired |
| US6054102A | Ozone producing apparatus utilizing feedback control from ozone density measurement | Chemistry; Metallurgy | 8 | Expired |
| US8108129B2 | Exhaust gas recirculation apparatus for an internal combustion engine | Emerging Cross-Sectional Technologies | 7 | Active |
| US8001953B2 | Exhaust gas recirculation system for internal combustion engine and method for controlling the same | Emerging Cross-Sectional Technologies | 7 | Active |
| US5174793A | Method of enhancing plant growth using light levels lower than photo saturation intensity | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5076209A | Breeding apparatus | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5139625A | Fluid treatment apparatus and method of its shutdown | Chemistry; Metallurgy | 7 | Expired |
| US9394816B2 | Particulate filter | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US7930922B2 | Soot generation amount estimation apparatus for internal combustion engine | Emerging Cross-Sectional Technologies | 6 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.