NSK LTD.
2,458Patents
1,147Active
2,458Granted
55Portfolio score
Filing activity: Jul 10, 1991 → Apr 9, 2025 · 183 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8102138B2 | Electric power steering apparatus and method of assembling the same | Electricity | 865 | Active |
| US5651750A | Dual cavity toroidal type continuously variable transmission | Mechanical Engineering; Lighting; Heating | 223 | Expired |
| US5379661A | Loading cam device | Emerging Cross-Sectional Technologies | 213 | Expired |
| US6991579B2 | Toroidal type continuously variable transmission | Mechanical Engineering; Lighting; Heating | 201 | Expired |
| US6805654B2 | Toroidal-type continuously variable transmission | Mechanical Engineering; Lighting; Heating | 199 | Expired |
| US6071210A | Troidal-type continuously variable transmission and a ball spline for use in the same | Mechanical Engineering; Lighting; Heating | 192 | Expired |
| US6251038A | Continuously variable transmission unit | Mechanical Engineering; Lighting; Heating | 144 | Expired |
| US7160220B2 | Continuously variable transmission apparatus | Mechanical Engineering; Lighting; Heating | 138 | Expired |
| US6171210A | Toroidal type continuous variable transmission system | Mechanical Engineering; Lighting; Heating | 136 | Expired |
| US6113513A | Toroidal type continuously variable transmission | Mechanical Engineering; Lighting; Heating | 135 | Expired |
| US5888160A | Continuously variable transmission | Mechanical Engineering; Lighting; Heating | 127 | Expired |
| US5644493A | Production information processing system | Emerging Cross-Sectional Technologies | 126 | Expired |
| US6782385B2 | Method and system for providing performance index information of a machine element, and method and system for supporting selection of a machine element | Emerging Cross-Sectional Technologies | 126 | Expired |
| US7217216B2 | Continuously variable transmission apparatus | Mechanical Engineering; Lighting; Heating | 124 | Active |
| US6932739B2 | Continuously variable transmission apparatus | Mechanical Engineering; Lighting; Heating | 120 | Expired |
| US7094171B2 | Continuously variable transmission apparatus | Mechanical Engineering; Lighting; Heating | 114 | Expired |
| US6942593B2 | Toroidal-type continuously variable transmission | Mechanical Engineering; Lighting; Heating | 113 | Expired |
| US7077777B2 | Continuously variable transmission | Mechanical Engineering; Lighting; Heating | 112 | Expired |
| US7034711B2 | Wireless sensor, rolling bearing with sensor, management apparatus and monitoring system | Mechanical Engineering; Lighting; Heating | 111 | Expired |
| US5462362A | Wear resisting slide member | Mechanical Engineering; Lighting; Heating | 110 | Expired |
| US6958029B2 | Continuously variable transmission apparatus | Mechanical Engineering; Lighting; Heating | 110 | Expired |
| US6991575B2 | Continuously variable transmission apparatus | Mechanical Engineering; Lighting; Heating | 108 | Expired |
| US6261200A | Continuously variable transmission | Mechanical Engineering; Lighting; Heating | 93 | Expired |
| US5444844A | Figure drawing apparatus and inventory purchasing system using the same | Physics | 81 | Expired |
| US5877433A | Bearing preload measuring method and apparatus | Mechanical Engineering; Lighting; Heating | 70 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.