Tetsurou Hamada
21Patents
8h-index
36Co-inventors
75Inventor score
Filing activity: Jun 26, 1987 → Jul 8, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5353889A | Power transmitting device for four-wheel drive vehicle | Emerging Cross-Sectional Technologies | 41 | Expired |
| US5038884A | Dog clutch mechanism | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US7523721B2 | Heat exchanger and water heater | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4848506A | Drive power transmission device | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6959238B2 | Vehicle control apparatus | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5752575A | Torque distribution control system in vehicle | Performing Operations; Transporting | 10 | Expired |
| US4890686A | Drive mode selecting system for four-wheel-drive motor vehicle | Performing Operations; Transporting | 9 | Expired |
| US4977989A | Dog clutch mechanism | Emerging Cross-Sectional Technologies | 8 | Expired |
| US7428883B2 | Heat exchanger and water heater | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6726591B2 | Four-wheel drive system for vehicles | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4902028A | Front and rear wheel steering apparatus for motor vehicles | Performing Operations; Transporting | 6 | Expired |
| US7863847B2 | Power unit | Emerging Cross-Sectional Technologies | 5 | Active |
| US4989476A | Torque transmitting device | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5244056A | Power transmitting system of four-wheel drive vehicle | Performing Operations; Transporting | 3 | Expired |
| US8425375B2 | Driving device for hybrid vehicle | Emerging Cross-Sectional Technologies | 3 | Active |
| US8770153B2 | Water heater | Emerging Cross-Sectional Technologies | 3 | Active |
| US5005685A | Torque transmitting device | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US4756209A | Drive power transmission device | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US7533743B2 | Control device for hybrid vehicle | Emerging Cross-Sectional Technologies | 1 | Expired |
| US7004749B2 | Combustion apparatus | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US6908299B2 | Combustion apparatus | Mechanical Engineering; Lighting; Heating | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.