Seinosuke Hara
77Patents
23h-index
48Co-inventors
88Inventor score
Filing activity: Mar 9, 1982 → Dec 6, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5924334A | Device for moving cam relative to its driving shaft | Emerging Cross-Sectional Technologies | 54 | Expired |
| US6575128B2 | Variable-valve-actuation apparatus for internal combustion engine | Mechanical Engineering; Lighting; Heating | 47 | Expired |
| US5501186A | Engine valve control mechanism | Mechanical Engineering; Lighting; Heating | 41 | Expired |
| US5365896A | Cam shaft assembly for use in internal combustion engine | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US5553573A | Valve duration control system for four-cycle engine | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5189998A | Valve mechanism of internal combustion engine | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US5988125A | Variable valve actuation apparatus for engine | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US5203289A | Variable timing mechanism | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US5445116A | Hydraulic variable lift engine valve gear | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US6041746A | Variable valve actuation apparatus | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4708101A | Driving apparatus for intake and exhaust valves of internal combustion engine | Emerging Cross-Sectional Technologies | 28 | Expired |
| US6390041B2 | Variable-valve-actuation apparatus for internal combustion engine | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US4539951A | Variable valve timing mechanism | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US5085182A | Variable valve timing rocker arm arrangement for internal combustion engine | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US4934347A | Variable compression piston arrangement for internal combustion engine | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US4438736A | Variable valve timing arrangement with automatic valve clearance adjustment | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US5333579A | Control device for controlling intake and exhaust valves of internal combustion engine | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5687681A | Phase changing mechanism for camshaft of internal combustion engine | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4759321A | Valve timing arrangement for internal combustion engine having multiple inlet valves per cylinder | Emerging Cross-Sectional Technologies | 24 | Expired |
| US7793625B2 | Variable valve actuating apparatus for internal combustion engine | Emerging Cross-Sectional Technologies | 24 | Active |
| US5452694A | Hydraulic variable lift engine valve gear | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US6123053A | Variable valve actuation apparatus for internal combustion engines | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US4526142A | Variable valve timing arrangement for an internal combustion engine or the like | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US5494009A | Valve control device for internal combustion engine | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US4567861A | Engine valve operating system for internal combustion engine | Mechanical Engineering; Lighting; Heating | 22 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.