Wilhelm Janssen
19Patents
7h-index
24Co-inventors
66Inventor score
Filing activity: Apr 29, 1976 → Jan 29, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6921985B2 | Low voltage ride through for wind turbine generators | Emerging Cross-Sectional Technologies | 68 | Expired |
| US7168251B1 | Wind energy turbine | Emerging Cross-Sectional Technologies | 62 | Expired |
| US7321221B2 | Method for operating a wind power plant and method for operating it | Electricity | 43 | Expired |
| US7471007B2 | Method for operating a wind power plant and method for operating it | Electricity | 22 | Active |
| US7504738B2 | Wind turbine and method for operating same | Emerging Cross-Sectional Technologies | 20 | Active |
| US7586206B2 | Wind turbine and method for operating same | Emerging Cross-Sectional Technologies | 12 | Active |
| US7471011B2 | Wind turbine over-voltage exposure | Emerging Cross-Sectional Technologies | 11 | Active |
| US7787266B2 | Method for operating a frequency converter of a generator | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4722710A | Life preserver | Performing Operations; Transporting | 7 | Expired |
| US4629506A | Process for the production of ferrochromium | Chemistry; Metallurgy | 6 | Expired |
| US4209322A | Method for processing dust-like matter from metallurgical waste gases | Chemistry; Metallurgy | 5 | Expired |
| US4576638A | Process for the production of ferromanganese | Chemistry; Metallurgy | 4 | Expired |
| US4389040A | Apparatus for separating a sponge iron product produced in a rotary furnace | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US4353534A | Apparatus for supplying gas to a revolving cylindrical furnace | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US4581061A | Method for reducing oxidic iron ores in a rotary kiln | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4599068A | Apparatus for preheating granular ore | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US10774808B2 | Method of operating a wind turbine without grid connection and wind turbine | Emerging Cross-Sectional Technologies | 1 | Active |
| US4189314A | Method of utilizing waste dust and waste sludge from blast furnaces and steel works | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4981510A | Process and apparatus for the production of ferrochromium | Mechanical Engineering; Lighting; Heating | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.