HITACHI CAR ENGINEERING CO., LTD.
434Patents
38Active
434Granted
44Portfolio score
Filing activity: Aug 2, 1995 → Jul 26, 2011 · 37 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6425838B1 | Motor/generator apparatus for motor vehicle | Emerging Cross-Sectional Technologies | 147 | Expired |
| US6182807A | Device and method for supplying power to a vehicle, semi-conductor circuit device for use in the same and collective wiring device for a vehicle or an automobile | Performing Operations; Transporting | 95 | Expired |
| US5811904A | Permanent magnet dynamo electric machine | Emerging Cross-Sectional Technologies | 78 | Expired |
| US6034460A | Permanent magnet rotating electric machine and electrically driven vehicle employing same | Emerging Cross-Sectional Technologies | 76 | Expired |
| US6311123A | Vehicle control method and vehicle warning method | Physics | 62 | Expired |
| US6188340A | Sensor adjusting circuit | Physics | 61 | Expired |
| US6208054A | Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine | Electricity | 59 | Expired |
| US5744874A | Car electronic control system & method for controlling the same | Emerging Cross-Sectional Technologies | 51 | Expired |
| US6543412B2 | Intake air control device and internal combustion engine mounting the same | Emerging Cross-Sectional Technologies | 50 | Expired |
| US6133662A | Permanent magnet dynamoelectric rotating machine and electric vehicle equipped with the same | Emerging Cross-Sectional Technologies | 48 | Expired |
| US6516785B1 | Air flow sensor | Electricity | 47 | Expired |
| US5659235A | Drive controller and control method for electric vehicle | Emerging Cross-Sectional Technologies | 47 | Expired |
| US6205010A | Switch circuit having protection function to interrupt input of control signal | Electricity | 46 | Expired |
| US6877383B2 | Capacitive type pressure sensor | Physics | 42 | Expired |
| US6404086B1 | Anisotropic magnet brushless motor having a rotor with elastic insulating support structure | Electricity | 42 | Expired |
| US5868114A | Air flow rate control apparatus | Mechanical Engineering; Lighting; Heating | 42 | Expired |
| US5696321A | Thermal-type air flow measuring instrument with fluid-direction judging capability | Physics | 41 | Expired |
| US6020844A | Car on-board radar axis adjusting method | Physics | 40 | Expired |
| US7284424B2 | Thermal air flow rate measuring apparatus and its flowmeter and internal combustion engine and thermal air flow rate measuring method using it | Physics | 39 | Expired |
| US5992391A | Electromagnetic fuel injector and control method thereof | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US6051853A | Semiconductor pressure sensor including reference capacitor on the same substrate | Physics | 38 | Expired |
| US6462430B1 | Hybrid car and dynamo-electric machine | Emerging Cross-Sectional Technologies | 38 | Expired |
| US7226379B2 | Active shift transmission, transmission control unit and automobile | Emerging Cross-Sectional Technologies | 38 | Expired |
| US6286478A | Control device for engine provided with electromagnetic driven intake valves and computer useable medium having computer readable program code for performing the control | Emerging Cross-Sectional Technologies | 37 | Expired |
| US6791207B2 | Power supplying apparatus for vehicle and intensive wiring apparatus | Performing Operations; Transporting | 36 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.