Masato Kumagai
34Patents
11h-index
43Co-inventors
75Inventor score
Filing activity: Nov 23, 1987 → Aug 27, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5993974A | Porcelain-enameled steel sheets and frits for enameling | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5467751A | Throttle valve control system | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US5823165A | Valve actuator arrangement for internal combustion engine | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US5423299A | Control valve opening control apparatus | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US5979405A | Apparatus for controlling a throttle valve electronically in an internal combustion engine | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5204300A | Methods of seeding sintered objects | Chemistry; Metallurgy | 17 | Expired |
| US4780299A | Method for producing aluminum nitride powder | Chemistry; Metallurgy | 17 | Expired |
| US6109240A | Apparatus for controlling a throttle valve electronically in an internal combustion engine | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US6039027A | Throttle valve device | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US7272693B2 | Storage system and back-up method for storage system | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6915690B2 | Fuel gauge | Physics | 11 | Expired |
| US6334885B1 | Method of solidifying steel-making slag and material produced by the method | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6516776B1 | Throttle valve device of engine | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6332451A | Rotary valve actuator arrangement | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6000377A | Apparatus for controlling a throttle valve electronically in an internal combustion engine | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6805106B2 | Fuel-injection system | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5462026A | Throttle valve assembly with traction control device | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US7716438B2 | Storage system and back-up method for storage system | Emerging Cross-Sectional Technologies | 8 | Active |
| US7213584B2 | Fuel supply apparatus and control method for internal combustion engine | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US7370816B2 | Fuel injector | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US5907971A | Device for returning reciprocating mechanism to predetermined position | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6032647A | Throttle valve control device | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US6792923B2 | Fuel supply system for vehicle | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5964203A | Throttle valve device of internal combustion engine | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US7013728B2 | System for detecting level of liquid in tank | Physics | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.