Yifei Chen

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Shenzhen, CN

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Patents Grantslast 30 patents

Information Patent Grant
Four-function anti-water hammer air valve set
- Patent number 9,383,034
- Issue date Jul 5, 2016
- Yifei Chen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Four-Function Anti-Water Hammer Air Valve Set
- Publication number 20140251449
- Publication date Sep 11, 2014
- Yifei Chen
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC