Qingfeng Li
28Patents
7h-index
27Co-inventors
69Inventor score
Filing activity: Sep 8, 2000 → May 26, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7559560B2 | Magic rollator | Human Necessities | 56 | Active |
| US6946211B1 | Polymer electrolyte membrane fuel cells | Emerging Cross-Sectional Technologies | 32 | Expired |
| US8434780B2 | Rollator | Human Necessities | 27 | Active |
| USD690884S1 | Anti-vibration dipped glove | General | 16 | Active |
| USD962129S1 | Walker | General | 14 | Active |
| USD940601S1 | Rollator | General | 12 | Active |
| USD654636S1 | Anti-vibration dipped glove | General | 8 | Expired |
| USD977373S1 | Rollator | General | 7 | Active |
| US8803868B2 | Power conservation for mobile device displays | Emerging Cross-Sectional Technologies | 5 | Active |
| USD891309S1 | Knee rest walker | General | 5 | Active |
| US9588648B2 | Providing history-based data processing | Physics | 4 | Active |
| US9280516B2 | Method and system to validate wired sensors | Emerging Cross-Sectional Technologies | 3 | Active |
| US8446398B2 | Power conservation for mobile device displays | Emerging Cross-Sectional Technologies | 3 | Active |
| USD937167S1 | Multi-function door step for car | General | 3 | Active |
| USD1036875S1 | Shower chair | General | 2 | Active |
| USD1033278S1 | Rollator frame | General | 1 | Active |
| US7066324B2 | Sanitary cigarette case | Performing Operations; Transporting | 1 | Expired |
| US11615535B2 | Systems and methods for image processing | Physics | 1 | Active |
| US11227390B2 | Systems and methods for image processing | Physics | 1 | Active |
| US11697813B2 | Pharmaceutical compositions and methods of use for activation of human fibroblast and myofibroblast apoptosis | Chemistry; Metallurgy | 0 | Active |
| US9883917B2 | Skin dilator | Human Necessities | 0 | Active |
| US11814737B2 | Process for producing alloy nanoparticles | Emerging Cross-Sectional Technologies | 0 | Active |
| USD1073310S1 | Suitcase | General | 0 | Active |
| US9888075B2 | Method and apparatus for data exchange based on user status | Electricity | 0 | Active |
| US9716752B2 | Method and apparatus for data exchange based on user status | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.