Christian Haag
23Patents
6h-index
45Co-inventors
69Inventor score
Filing activity: Sep 29, 1995 → Jan 12, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6343909B1 | Centrifugal pump | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US9494162B2 | Axial fan with additional flow channel | Electricity | 10 | Active |
| US8807949B2 | Radial fan wheel arrangement | Mechanical Engineering; Lighting; Heating | 8 | Active |
| USD643916S1 | Fan | General | 8 | Expired |
| US8317471B2 | Method for preventing rotor overspeed of a wind turbine | Emerging Cross-Sectional Technologies | 8 | Active |
| USD644315S1 | Fan | General | 7 | Expired |
| US8992175B2 | Compact fan | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US5605434A | Impeller having transport elements disposed on a pressure side of a cover disk for a centrifugal pump for dirty liquids | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US9932990B2 | Ventilation device, in particular for heating, cooling, and/or humidifying air in residential buildings | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US8430632B2 | System and method for pitching a rotor blade in a wind turbine | Emerging Cross-Sectional Technologies | 4 | Active |
| US9450474B2 | Active cooling of a motor | Electricity | 4 | Active |
| US8178989B2 | System and methods for adjusting a yaw angle of a wind turbine | Emerging Cross-Sectional Technologies | 4 | Active |
| USD782645S1 | Fan flow grid | General | 3 | Active |
| US9045141B2 | Method for operating a vehicle and vehicle | Performing Operations; Transporting | 2 | Active |
| US8683688B2 | Method for balancing a wind turbine | Emerging Cross-Sectional Technologies | 1 | Active |
| US9273668B2 | Yaw system for a windmill | Emerging Cross-Sectional Technologies | 1 | Active |
| US9080553B2 | Method and apparatus for control of redundant devices in a wind turbine | Emerging Cross-Sectional Technologies | 1 | Active |
| US11181412B2 | Gas meter contamination filtering device | Physics | 0 | Active |
| US11706880B2 | Explosion-proof pressure-tight housing for electrical operating devices | Electricity | 0 | Active |
| US11333540B2 | Sensor bypass for gas meters | Physics | 0 | Active |
| US10612561B2 | Intel nozzle for a radial fan | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US11680584B2 | Fan having an external rotor motor and cooling duct for cooling the motor electronics and motor drive components | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US10590954B2 | Flat flow-conducting grille | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.