Lei; Qingping
Patent Applications and Registrations
Patent applications and USPTO patent grants for Lei; Qingping.The latest application filed is for "engineering vehicle having ballast unloading device and ballast leveling device".
- Lei; Qingping - Wuhan CN
| Patent | Date |
|---|---|
| Engineering vehicle having ballast unloading device and ballast leveling device Grant 10,501,096 - Chen , et al. Dec | 2019-12-10 |
| Engineering Vehicle Having Ballast Unloading Device And Ballast Leveling Device App 20170327130 - CHEN; Wei ; et al. | 2017-11-16 |
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