Norbert Sann
21Patents
6h-index
22Co-inventors
69Inventor score
Filing activity: Nov 26, 1991 → Dec 21, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5560824A | Filter device with closing arrangement and key opening connection | Performing Operations; Transporting | 76 | Expired |
| US9044695B2 | Filter device and filter element for use with such a filter device | Performing Operations; Transporting | 25 | Active |
| US5200067A | Device for mounting a filter element | Performing Operations; Transporting | 15 | Expired |
| US7022228B2 | Filter device | Performing Operations; Transporting | 11 | Expired |
| US7252759B2 | In-tank return line filter element and hydraulic reservoir with same | Performing Operations; Transporting | 9 | Expired |
| US7997421B2 | Filtering apparatus and filter element | Performing Operations; Transporting | 7 | Active |
| US8449765B2 | Filter with data storage provided with an antenna for transmitting signals | Performing Operations; Transporting | 6 | Active |
| US7279091B2 | Filter device | Performing Operations; Transporting | 5 | Expired |
| US8840787B2 | Filter device, in particular return line suction filter, and filter element for use in such a filter device | Performing Operations; Transporting | 5 | Active |
| US7926515B2 | Modular unit | Emerging Cross-Sectional Technologies | 3 | Active |
| US8550255B2 | Filter device and filter element | Performing Operations; Transporting | 2 | Active |
| US10005010B2 | Filter device | Performing Operations; Transporting | 2 | Active |
| USRE46080E1 | Filtering apparatus and filter element | General | 2 | Active |
| US6932900B2 | Filter device | Performing Operations; Transporting | 1 | Expired |
| US9393508B2 | Filter device | Performing Operations; Transporting | 1 | Active |
| US9884274B2 | Filter apparatus | Performing Operations; Transporting | 1 | Active |
| US10201769B2 | Filter device | Performing Operations; Transporting | 0 | Active |
| US10335721B2 | Filter element for a filter device | Performing Operations; Transporting | 0 | Active |
| US9643109B2 | Filter device | Performing Operations; Transporting | 0 | Active |
| US9808749B2 | Device for the suction filtration of fluids | Emerging Cross-Sectional Technologies | 0 | Active |
| US10617976B2 | Filter apparatus | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.