Dongfeng Yang

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Luoyang, CN

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Patents Grantslast 30 patents

Information Patent Grant
Top drive mechanism for drill rod
- Patent number 9,458,382
- Issue date Oct 4, 2016
- LUOYANG JIANGUANG SPECIAL EQUIPMENT CO., LTD
- Zhiping Liu
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...

Patents Applicationslast 30 patents

Information Patent Application
TOP DRIVE MECHANISM FOR DRILL ROD
- Publication number 20140014491
- Publication date Jan 16, 2014
- LUOYANG JIANGUANG PETROCHEMICAL EQUIPMENT CO., LTD
- Zhiping Liu
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...