Hirofumi Ota
36Patents
9h-index
48Co-inventors
75Inventor score
Filing activity: Jul 28, 1982 → May 9, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7101305B2 | Planetary-gear-type multiple-step transmission for vehicle | Mechanical Engineering; Lighting; Heating | 215 | Expired |
| US7972237B2 | Gear train unit with motor generator | Emerging Cross-Sectional Technologies | 52 | Active |
| US7118509B2 | Multiple-step transmission | Mechanical Engineering; Lighting; Heating | 32 | Expired |
| US7402119B2 | Multi-speed transmission for vehicle | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US7276011B2 | Automatic transmission | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US7337051B2 | Shift control apparatus for step-variable automatic transmission | Emerging Cross-Sectional Technologies | 15 | Expired |
| US7267630B2 | Multistage transmission | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US7076355B2 | Shift control apparatus for vehicle step-variable automatic transmission | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US7488269B2 | Automatic transmission | Mechanical Engineering; Lighting; Heating | 9 | Active |
| US7186203B2 | Planetary gear type multistage transmission for vehicle | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US7384361B2 | Planetary gear type multistage transmission for vehicle | Mechanical Engineering; Lighting; Heating | 7 | Active |
| US7419452B2 | Control apparatus of vehicular automatic transmission | Emerging Cross-Sectional Technologies | 7 | Active |
| US7232022B2 | Clutch-purpose hydraulic servo | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US7172527B2 | Planetary-gear-type multiple-step transmission for vehicle | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US7604558B2 | Automatic transmission with lubricating structure | Emerging Cross-Sectional Technologies | 5 | Active |
| US7559867B2 | Connection structure for automatic transmission | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US9702381B2 | Hydraulic control system | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US4470131A | Bubble memory device and method of manufacturing the same | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7393299B2 | Hydraulic control apparatus and hydraulic control method for automatic transmission | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US7462130B2 | Control apparatus and control method of an automatic transmission | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US7517297B2 | Multistage transmission | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US7648013B2 | Oil pressure supply in an automatic transmission | Emerging Cross-Sectional Technologies | 2 | Active |
| US7682276B2 | Hydraulic control system for use in a motor vehicle and method for controlling the hydraulic control system | Emerging Cross-Sectional Technologies | 2 | Active |
| US7748504B2 | Hydraulic servo for a brake in an automatic transmission | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US7524267B2 | Control apparatus for vehicular automatic transmission | Mechanical Engineering; Lighting; Heating | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.