NIPPON SOKEN, INC.
1,700Patents
432Active
1,700Granted
52Portfolio score
Filing activity: Jun 20, 1973 → May 8, 2018 · 243 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5070293A | Electric power transmitting device with inductive coupling | Emerging Cross-Sectional Technologies | 301 | Expired |
| US5786640A | Generator control system for a hybrid vehicle driven by an electric motor and an internal combustion engine | Emerging Cross-Sectional Technologies | 177 | Expired |
| US4489695A | Method and system for output control of internal combustion engine | Mechanical Engineering; Lighting; Heating | 172 | Expired |
| US4434767A | Output control system for multicylinder internal combustion engine | Mechanical Engineering; Lighting; Heating | 165 | Expired |
| US4729459A | Adjustable damping force type shock absorber | Performing Operations; Transporting | 155 | Expired |
| US5360268A | Ultrasonic temperature measuring apparatus | Physics | 152 | Expired |
| US5105918A | Detection of damping force for shock absorber control | Performing Operations; Transporting | 130 | Expired |
| US4386947A | Apparatus for adsorbing fuel vapor | Emerging Cross-Sectional Technologies | 125 | Expired |
| US4643745A | Air cleaner using ionic wind | Performing Operations; Transporting | 122 | Expired |
| US4707788A | Automatic adjuster for automobile driver equipment | Performing Operations; Transporting | 121 | Expired |
| US4310419A | Filter element for liquid straining filter | Performing Operations; Transporting | 118 | Expired |
| US5939794A | Engine control system for hybrid vehicle | Emerging Cross-Sectional Technologies | 109 | Expired |
| US4689056A | Air cleaner using ionic wind | Performing Operations; Transporting | 93 | Expired |
| US4603671A | Fuel injector for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 88 | Expired |
| US4556599A | Heat reflection film | Emerging Cross-Sectional Technologies | 84 | Expired |
| US6756697B2 | Mounting structure including communication system for transmitting multiplex control signal to vehicle electrical devices | Performing Operations; Transporting | 82 | Expired |
| US5969624A | Battery charge control system for a hybrid vehicle driven by an electric motor and an internal combustion engine | Emerging Cross-Sectional Technologies | 82 | Expired |
| US7950230B2 | Waste heat recovery apparatus | Emerging Cross-Sectional Technologies | 80 | Active |
| US5674058A | Scroll-type refrigerant compressor | Mechanical Engineering; Lighting; Heating | 78 | Expired |
| US6597320B2 | Antenna for portable radio communication device and method of transmitting radio signal | Electricity | 71 | Expired |
| US5316336A | Air bag apparatus | Performing Operations; Transporting | 70 | Expired |
| US4516993A | Carbon particulates cleaning device | Emerging Cross-Sectional Technologies | 69 | Expired |
| US4438543A | Windshield wiper device | Performing Operations; Transporting | 69 | Expired |
| US5639225A | Scroll type compressor | Mechanical Engineering; Lighting; Heating | 68 | Expired |
| US4672565A | Direction detecting system for vehicles | Physics | 68 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.