Yanan Liu

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Dongying, Shandong Province, CN

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Patents Grantslast 30 patents

Information Patent Grant
Oil pumping apparatus without a speed reducer
- Patent number 10,458,214
- Issue date Oct 29, 2019
- Yanan Liu
- G05 - CONTROLLING REGULATING
Information Patent Grant
Flexible beam vertical pumping unit
- Patent number 10,408,200
- Issue date Sep 10, 2019
- Yanan Liu
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...