Naoya Takagi
40Patents
13h-index
33Co-inventors
81Inventor score
Filing activity: May 14, 1997 → Jan 31, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6761154B2 | Evaporative fuel processing apparatus and control method of same | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US5845625A | Defect diagnosing apparatus of evaporation purge system | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US5954034A | Malfunction diagnosis apparatus for evaporated fuel purge system | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US6240908A | Fuel storage device diagnostic apparatus | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US6371089B1 | Diagnostic apparatus and method of fuel vapor purge system | Emerging Cross-Sectional Technologies | 22 | Expired |
| US6405718B1 | Malfunction test apparatus for fuel vapor purge system | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US5878728A | Failure diagnosis apparatus for evaporative purge system | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US6102003A | Apparatus for detecting concentration of fuel vapor in lean-burn internal combustion engine, and applied apparatus thereof | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US6044831A | Fuel vapor feed controlling apparatus for lean burn type internal combustion engine | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US6257209A | Evaporative fuel processing apparatus for lean-burn internal combustion engine | Emerging Cross-Sectional Technologies | 19 | Expired |
| US6446614B1 | Fuel storage apparatus and abnormality diagnostic method | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US6438945B1 | Evaporated fuel treatment device of an engine | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5735251A | Fuel-vapor emission control apparatus for engine | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US6474148B2 | Diagnostic apparatus for fuel vapor purge system | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US5778859A | Evaporative fuel processing apparatus of internal combustion engine | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US6575146B1 | Diagnostic apparatus for an evaporated fuel system, and vehicle control apparatus for a vehicle equipped with the diagnostic apparatus | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6769419B2 | Diagnostic apparatus for an evaporated fuel system, and vehicle control apparatus for a vehicle equipped with the diagnostic apparatus | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6283088A | Method and apparatus for processing vapor fuel of lean-burn internal combustion engine | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6067819A | Method for manufacturing glass container and apparatus therefor | Chemistry; Metallurgy | 9 | Expired |
| US8784741B2 | Electrically-heated catalytic converter | Emerging Cross-Sectional Technologies | 7 | Active |
| US6679230B2 | Diagnostic apparatus for an evaporated fuel system, and vehicle control apparatus for a vehicle equipped with the diagnostic apparatus | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6145306A | Exhaust gas purifying of lean-burn internal combustion engine | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US6131448A | Diagnostic apparatus and method for fuel vapor treating apparatus | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5836291A | Evaporated fuel processing apparatus for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US6257218A | Fuel vapor feed controlling apparatus for a lean burn type internal combustion engine | Mechanical Engineering; Lighting; Heating | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.