Assignee
Inventors
- Wanhui Liu (13 patents)
- Qingchun Zhang (85 patents)
- Shixu Li (1 patents)
- Kajia Su (1 patents)
- Shuyan Liu (9 patents)
- Fabing Zhu (1 patents)
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Skip to contentUS Patent 6475520 · Granted Nov 5, 2002