Hirokazu Shimizu
95Patents
16h-index
97Co-inventors
87Inventor score
Filing activity: Mar 7, 1980 → Mar 1, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5475670A | Deflection plate for optical pick-up device | Physics | 33 | Expired |
| US5386429A | Low operating current and low noise semiconductor laser device for optical disk memories | Electricity | 33 | Expired |
| US5479426A | Semiconductor laser device with integrated reflector on a (511) tilted lattice plane silicon substrate | Electricity | 28 | Expired |
| US7208207B2 | Liner for high pressure gas container and high pressure gas container | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5297158A | Semiconductor laser device including a gallium-aluminum arsenic compound | Electricity | 26 | Expired |
| US6168015A | CD package | Physics | 22 | Expired |
| US6750158B2 | Method for producing a semiconductor device | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4675074A | Method of manufacturing semiconductor device | Electricity | 20 | Expired |
| US5632257A | Diagnosis apparatus and method for an exhaust gas recirculation unit of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4546478A | Semiconductor laser | Electricity | 18 | Expired |
| US5740780A | Control system for improved cylinder torque balance of engine | Emerging Cross-Sectional Technologies | 17 | Expired |
| US7324889B2 | Intake-air quantity control system of engine | Emerging Cross-Sectional Technologies | 17 | Active |
| US4673188A | Boot with bracing boss portion for universal joint | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US6073606A | Apparatus for controlling fuel injection for a direct-injection gasoline engine and a method thereof | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5970950A | Control method and control apparatus of direct injection gasoline engine | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6705257B2 | Apparatus and method for controlling variable valve in internal combustion engine | Emerging Cross-Sectional Technologies | 16 | Expired |
| USD731312S1 | Fixture for aerosol spray container | General | 14 | Active |
| US6999864B2 | Apparatus and method for estimating residual gas amount of internal combustion engine, and apparatus and method for controlling intake air amount of internal combustion engine using estimated residual gas amount | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4731792A | Semiconductor laser device with decreased light intensity noise | Electricity | 14 | Expired |
| US4371967A | Semiconductor laser | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5793785A | Semiconductor laser device | Electricity | 11 | Expired |
| US6691506B2 | Device and method for controlling variable valve timing of internal combustion engine | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5703285A | Diagnosis apparatus and method for an exhaust gas recirculation unit of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4366568A | Semiconductor laser | Electricity | 10 | Expired |
| US6920851B2 | Variable valve control apparatus for internal combustion engine and method thereof | Emerging Cross-Sectional Technologies | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.