Hiromasa Sakai
34Patents
12h-index
28Co-inventors
81Inventor score
Filing activity: Sep 14, 1992 → Aug 1, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6659901B2 | Infinite speed ratio continuously variable transmission | Mechanical Engineering; Lighting; Heating | 115 | Expired |
| US5950787A | Rotation clutch device for automatic transmission | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US6023648A | Anti-creep control apparatus for automatic transmission | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US5616100A | Lockup control system for torque converter | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US5616099A | Lock-up control system for torque converter | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5288279A | Hydraulic control system for automatic transmission | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5935039A | Non-finite speed change ratio transmission device | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US6351700B1 | Speed change controller and control method of infinite speed ratio continuously variable transmission | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US6358179B1 | Clutch control device of infinite variable speed ratio transmission | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US5928111A | Fuel cut-off and fuel-supply recovery control system for internal combustion engine coupled to an automatic power transmission with a lock-up torque converter | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US6569051B2 | Infinite speed ratio continuously variable transmission | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US5938563A | Shift control apparatus of automatic transmission | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US6409625B1 | Controller of toroidal continuously variable transmission | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US5906559A | Automatic transmission with anti-creep control apparatus | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US6312357A | Speed ratio controller and control method of non-finite speed ratio transmission device | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US6287232A | Non-finite speed ratio continuously variable transmission device | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US5916058A | Anti-creep control apparatus of automatic transmission | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US5925086A | Vehicular automatic transmission and apparatus and method for controlling gear shift thereof | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6436001B1 | Speed change controller for infinite speed ratio transmission | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6317672A | Controller for infinite speed ratio transmission | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US7455920B2 | Fuel cell system | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6080079A | Toroidal continuously variable transmission | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5906556A | Line pressure control apparatus of automatic transmission | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6056094A | Hydraulic control device for automatic transmission | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6569052B2 | Control of infinitely variable transmission | Mechanical Engineering; Lighting; Heating | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.