Yichuan Pan
27Patents
11h-index
17Co-inventors
72Inventor score
Filing activity: Oct 30, 1995 → Mar 31, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6908179B2 | Ink level and negative pressure control in an ink jet printer | Performing Operations; Transporting | 40 | Expired |
| US6866359B2 | Ink jet printhead quality management system and method | Performing Operations; Transporting | 27 | Expired |
| US9585807B2 | Collapsible upright wheeled walker apparatus | Human Necessities | 26 | Active |
| USD874351S1 | Wheeled walker | General | 23 | Active |
| USD902791S1 | Wheeled walker | General | 18 | Active |
| US7210771B2 | Ink delivery system with print cartridge, container and reservoir apparatus and method | Performing Operations; Transporting | 17 | Expired |
| US10555866B2 | Wheeled walker wheel direction lock apparatus and method | Human Necessities | 16 | Active |
| US7004574B2 | Ink delivery system including a pulsation dampener | Performing Operations; Transporting | 15 | Expired |
| US10617592B2 | Wheeled walker | Human Necessities | 13 | Active |
| US5685074A | Method of forming an inkjet printhead with trench and backward peninsulas | Emerging Cross-Sectional Technologies | 12 | Expired |
| US8716598B2 | Case for housing and protecting an electronic device | Electricity | 12 | Active |
| US10307321B2 | Wheeled walker with a movable seat | Human Necessities | 11 | Active |
| US5755032A | Method of forming an inkjet printhead with channels connecting trench and firing chambers | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7234787B2 | Liquid level detection method and apparatus | Performing Operations; Transporting | 11 | Expired |
| US6877846B2 | Replaceable ink jet supply with anti-siphon back pressure control | Performing Operations; Transporting | 9 | Expired |
| US6935731B2 | Ink jet print system including print cartridge | Performing Operations; Transporting | 8 | Expired |
| US11071676B2 | Collapsible wheeled walker with stability enhancing bracket apparatus and method | Human Necessities | 6 | Active |
| US6513905B2 | Nozzle cross talk reduction in an ink jet printer | Performing Operations; Transporting | 6 | Expired |
| US8735721B2 | Case for housing and protecting an electronic device | Electricity | 5 | Active |
| US10588815B2 | Collapsible upright wheeled walker apparatus | Human Necessities | 5 | Active |
| US6692116B2 | Replaceable ink jet print head cartridge assembly with reduced internal pressure for shipping | Performing Operations; Transporting | 5 | Expired |
| US10973730B2 | Wheeled walker | Human Necessities | 4 | Active |
| US10085909B2 | Collapsible upright wheeled walker apparatus | Human Necessities | 3 | Active |
| US10322056B2 | Collapsible upright wheeled walker apparatus | Human Necessities | 2 | Active |
| US10434031B2 | Wheeled walker with a moveable seat | Human Necessities | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.