Hiroaki Maeda
47Patents
14h-index
70Co-inventors
84Inventor score
Filing activity: Jul 26, 1973 → May 19, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8558616B2 | Amplifying apparatus | Electricity | 76 | Active |
| US3969958A | Output split type hydrostatic transmission | Mechanical Engineering; Lighting; Heating | 46 | Expired |
| US5637048A | Power train device | Performing Operations; Transporting | 43 | Expired |
| US4261229A | Automatic speed ratio control system for stepless transmission of automotive vehicles | Mechanical Engineering; Lighting; Heating | 43 | Expired |
| US7456688B2 | Signal extraction circuit and distortion-compensated amplifier incorporating the same | Electricity | 37 | Active |
| US6074321A | Transaxle assembly | Performing Operations; Transporting | 36 | Expired |
| US4253347A | Automatic speed ratio control system for stepless transmission of automotive vehicles | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US4220059A | Speed ratio control system for stepless transmission of vehicles | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US8364101B2 | Amplifying device and transmitter apparatus | Electricity | 23 | Active |
| US4368653A | Hydromechanical transmission | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4170153A | Hydromechanical transmission | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US7786797B2 | Amplifying apparatus | Electricity | 15 | Active |
| US4131035A | Hydromechanical transmission | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4229998A | Automatic speed ratio control system for stepless transmission of automotive vehicles | Emerging Cross-Sectional Technologies | 14 | Expired |
| US3943715A | Servo mechanism | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US5139122A | Torque converter including a lock-up clutch | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US4232568A | Output split-type mechanical and hydraulic transmission | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US8618978B2 | Position information providing system indoor transmitter and method for providing position information | Electricity | 11 | Active |
| US5813506A | Direct-coupled clutch for torque converter | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US5720375A | Coupling device for use in differential gear devices | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US3978772A | Piston shoe for fluid pressure pump motor | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4254672A | Control system for a stepless variable speed transmission | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4885960A | Control system for automatic transmission | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5560914A | Immunopotentiator and method of manufacturing the same | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4184385A | Output split-type mechanical and hydraulic transmission | Mechanical Engineering; Lighting; Heating | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.