Wenfeng SUN

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Hainan, CN

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Patents Grantslast 30 patents

Information Patent Grant
Semi-left-hand-thread-removal screw
- Patent number 10,260,550
- Issue date Apr 16, 2019
- Chaoyi Li
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS

Patents Applicationslast 30 patents

Information Patent Application
SEMI-LEFT-HAND-THREAD-REMOVAL SCREW
- Publication number 20170058935
- Publication date Mar 2, 2017
- Chaoyi LI
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...