Guinfeng Chen

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Qinhuangdao, CN

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Patents Grantslast 30 patents

Information Patent Grant
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- Patent number 9,114,285
- Issue date Aug 25, 2015
- Alexander K. Guo
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Tennis Ball Pick-Up Cart
- Publication number 20140294547
- Publication date Oct 2, 2014
- Alexander K. Guo
- A63 - SPORTS GAMES AMUSEMENTS