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Patent applications and USPTO patent grants for Li; Xiangrui.The latest application filed is for "testing device for electromagnetic attraction force of a magnetic track brake".
Patent | Date |
---|---|
Hand brake limiting device Grant 9,932,053 - Bi , et al. April 3, 2 | 2018-04-03 |
Hand brake Grant 9,828,009 - Bi , et al. November 28, 2 | 2017-11-28 |
Testing device for electromagnetic attraction force of a magnetic track brake Grant 9,677,959 - Li , et al. June 13, 2 | 2017-06-13 |
Testing Device For Electromagnetic Attraction Force Of A Magnetic Track Brake App 20170052080 - LI; XIANGRUI ;   et al. | 2017-02-23 |
Hand Brake Limiting Device App 20160347335 - BI; JINGQUAN ;   et al. | 2016-12-01 |
Hand Brake App 20160257317 - BI; JINGQUAN ;   et al. | 2016-09-08 |
Vision treatment procedures and devices Grant 8,002,409 - Li , et al. August 23, 2 | 2011-08-23 |
Vision Treatment Procedures and Devices App 20110013138 - Li; Geng ;   et al. | 2011-01-20 |
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