Kai Lehmann
16Patents
6h-index
19Co-inventors
63Inventor score
Filing activity: May 8, 1975 → Sep 8, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6164248A | Control device for the coolant and heating circulation circuit of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US6971353B2 | Camshaft adjustment control device | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US6371060B1 | Control device for the cooling and heating circuit of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US7025023B2 | Hydraulic camshaft adjuster for an internal combustion engine | Emerging Cross-Sectional Technologies | 17 | Expired |
| US6257177A | Water pump for the cooling circuit of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US3999422A | Ultrasonic test method and apparatus for testing thick-walled workpieces | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7004130B2 | Camshaft adjuster for an internal combustion engine having hydraulic medium guides | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6912982B2 | Device for changing the angle of rotation of a camshaft relative to a drive wheel of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US7234427B2 | Locking device for a camshaft adjuster | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US9404396B2 | Motor vehicle valve train adjustment device | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US6526929B2 | Device for relative angular adjustment between two drive-connected elements rotating at the same rotational speed | Emerging Cross-Sectional Technologies | 1 | Expired |
| US7305947B2 | Sealing element and pivoting motor | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US6688265B2 | Camshaft adjustment device for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US9631523B2 | Internal combustion engine valve train adjustment device | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US7237517B2 | Camshaft adjuster of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 0 | Expired |
| US7661397B2 | Hydraulic camshaft adjuster and method for assembling the same | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.