Nippon Seiko Co., Ltd.
358Patents
3Active
358Granted
42Portfolio score
Filing activity: Apr 3, 1973 → Mar 20, 2018 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4795278A | Bearing assembly | Mechanical Engineering; Lighting; Heating | 66 | Expired |
| US4967618A | Electric steering apparatus | Emerging Cross-Sectional Technologies | 62 | Expired |
| US4958941A | Support unit | Mechanical Engineering; Lighting; Heating | 61 | Expired |
| US5048094A | Method and apparatus for checking pattern | Physics | 50 | Expired |
| US4656545A | Magnetic disc memory device | Physics | 46 | Expired |
| US5060977A | Magnet-inclusive component suitable for use in occupant-protecting means for motor vehicle and fabrication process thereof | Emerging Cross-Sectional Technologies | 44 | Expired |
| US4683391A | Magnetically floating actuator having angular positioning function | Mechanical Engineering; Lighting; Heating | 43 | Expired |
| US4966041A | Displacement detection device | Physics | 43 | Expired |
| US4991442A | Method and apparatus for detecting cracks in bearings | Physics | 42 | Expired |
| US4901592A | Shock absorbing steering apparatus | Performing Operations; Transporting | 41 | Expired |
| US4505484A | Sealing device for a rolling bearing | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US5018384A | Rotational speed detector | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US4934836A | Dynamic pressure type fluid bearing device | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US4759427A | Nozzle assembly of a constant fine lubrication device | Emerging Cross-Sectional Technologies | 37 | Expired |
| US4930909A | Rolling bearing | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4943087A | Warning device for passive seat belt system | Performing Operations; Transporting | 36 | Expired |
| US4995640A | Magnetic sensor actuation system suitable for use in passive seat belt system | Performing Operations; Transporting | 35 | Expired |
| US4941758A | Linear sliding guide bearing | Emerging Cross-Sectional Technologies | 35 | Expired |
| US4805972A | Dynamic pressure gas bearing device | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US4989898A | Energy absorption type steering apparatus | Performing Operations; Transporting | 34 | Expired |
| US5030017A | Rolling bearing | Emerging Cross-Sectional Technologies | 34 | Expired |
| US4778286A | Bearing assembly | Mechanical Engineering; Lighting; Heating | 32 | Expired |
| US4661773A | Method of and apparatus for magnetically detecting the three-dimensional rotational position and movement of an object | Performing Operations; Transporting | 31 | Expired |
| US4594909A | Tiltable steering mechanism | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5085733A | Rolling steel bearing | Emerging Cross-Sectional Technologies | 31 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.