Zhengzhao Li

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Lubricating oil composition for diesel oil vehicle
- Patent number 8,138,131
- Issue date Mar 20, 2012
- Beijing Hookeyvery Lubrication Technology Co., Ltd.
- Zhengzhao Li
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...

Patents Applicationslast 30 patents

Information Patent Application
LUBRICATING OIL COMPOSITION FOR DIESEL OIL VEHICLE
- Publication number 20090305921
- Publication date Dec 10, 2009
- Beijing Hookeyvery Lubrication Technology Co. Ltd.
- Zhengzhao Li
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...