Yajun Li
106Patents
28h-index
107Co-inventors
93Inventor score
Filing activity: Jul 25, 1991 → Jul 18, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6340114B1 | Imaging engine and method for code readers | Physics | 399 | Expired |
| US5710417A | Bar code reader for reading both one dimensional and two dimensional symbologies with programmable resolution | Physics | 318 | Expired |
| US6398112B1 | Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology | Physics | 299 | Expired |
| US5621203A | Method and apparatus for reading two-dimensional bar code symbols with an elongated laser line | Physics | 297 | Expired |
| US5504316A | Laser scanning system and scanning method for reading 1-D and 2-D barcode symbols | Physics | 172 | Expired |
| US5717221A | Multiple laser indicia reader optionally utilizing a charge coupled device (CCD) detector and operating method therefor | Physics | 170 | Expired |
| US5672858A | Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology | Physics | 156 | Expired |
| US6123264A | Apparatus and method for determining a distance to a target | Physics | 108 | Expired |
| US6360949B1 | Retro-reflective scan module for electro-optical readers | Physics | 102 | Expired |
| US5278397A | Multi-resolution bar code reader | Physics | 97 | Expired |
| US6648227B2 | Scanning module for a bar code reader with a focusing lens | Physics | 91 | Expired |
| US5332892A | Optical systems for bar code scanners | Physics | 87 | Expired |
| US5966230A | Integrated scanner on a common substrate | Physics | 68 | Expired |
| US6092728A | Miniature laser diode focusing module using micro-optics | Physics | 64 | Expired |
| US5859418A | CCD-based bar code scanner with optical funnel | Physics | 59 | Expired |
| US5821521A | Optical scanning assembly with flexible diaphragm | Physics | 58 | Expired |
| US5637856A | Scanning system and scanning method with scan pattern control for reading 1-D and 2-D barcode symbols | Physics | 47 | Expired |
| US6592040B2 | Hand-held bar code reader with single printed circuit board | Physics | 47 | Expired |
| US6164540A | Optical scanners | Physics | 46 | Expired |
| US5468952A | Miniature high speed scan element mounted on a personal computer interface card | Physics | 40 | Expired |
| US6059188A | Packaged mirror including mirror travel stops | Electricity | 40 | Expired |
| US6209788A | Optical scanners | Physics | 39 | Expired |
| US6065678A | Bar code scanner having a focusing system | Physics | 36 | Expired |
| US6651888B1 | Beam shaping system and diverging laser beam for scanning optical code | Physics | 35 | Expired |
| US5521367A | Fiber optic barcode reader with piezoelectric element | Physics | 33 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.