Robert Hasenfratz
41Patents
5h-index
47Co-inventors
69Inventor score
Filing activity: Dec 21, 1995 → Jun 2, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5695355A | Locking device for a connector | Electricity | 26 | Expired |
| US9289710B2 | Filter element and air filter | Performing Operations; Transporting | 12 | Active |
| US5791932A | Releasable connector assembly | Electricity | 11 | Expired |
| US10384158B2 | Filter element having filter bellows | Performing Operations; Transporting | 8 | Active |
| US9638147B2 | Filter element with at least one guide crosspiece, filter with a filter element and filter housing of a filter | Mechanical Engineering; Lighting; Heating | 7 | Active |
| US9498744B2 | Air filter element and air filter | Performing Operations; Transporting | 5 | Active |
| US10316804B2 | Filter element with at least one guide crosspiece, filter with a filter element and filter housing of a filter | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US9415337B2 | Air filter element and air filter | Performing Operations; Transporting | 4 | Active |
| US10737201B2 | Filter system and filter element | Performing Operations; Transporting | 3 | Active |
| US6398574B1 | Sleeve and stud connector latch | Electricity | 3 | Expired |
| US10399012B2 | Treatment device for treating fluids, in particular liquid fluids, and treatment element of treatment device | Performing Operations; Transporting | 3 | Active |
| US10399010B2 | Treatment device for treating fluids, in particular liquid fluids, and treatment element of treatment device | Performing Operations; Transporting | 2 | Active |
| US11027227B2 | Treatment device for treating fluids, in particular liquid fluids, and treatment element of treatment device | Performing Operations; Transporting | 2 | Active |
| US7805990B2 | Arrangement of an air mass meter at a flow channel | Physics | 2 | Active |
| US10220334B2 | Filter element and method for producing a filter element | Emerging Cross-Sectional Technologies | 1 | Active |
| US9914085B2 | Filter element and filter system | Performing Operations; Transporting | 1 | Active |
| US10702812B2 | Filter housing with locking form-fit elements and spring loading a filter element in the housing | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US9759170B2 | Filter element, filter with a filter element and a filter housing of a filter | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US9687768B2 | Filter device | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US9861924B2 | Filter element and filter system | Performing Operations; Transporting | 1 | Active |
| US10561969B2 | Filter element having supporting elements, filter having a filter element, and filter housing of a filter | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US10279298B2 | Plate-type filter element for gas filtration | Performing Operations; Transporting | 1 | Active |
| US11701602B2 | Treatment device for treating fluids, in particular liquid fluids, and treatment element of treatment device | Performing Operations; Transporting | 1 | Active |
| US9511318B2 | Filter element with hand grip elements and filter with a filter element | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US9284925B2 | Flat filter element of a filter, filter and support device of a filter | Performing Operations; Transporting | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.