Zhongyi Xu

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Shenzhen, CN

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Patents Grantslast 30 patents

Information Patent Grant
Suppression device for outdoor noise in indoor space
- Patent number 9,230,534
- Issue date Jan 5, 2016
- Zhongyi Xu
- G10 - MUSICAL INSTRUMENTS ACOUSTICS

Patents Applicationslast 30 patents

Information Patent Application
SUPPRESSION DEVICE FOR OUTDOOR NOISE IN INDOOR SPACE
- Publication number 20130301843
- Publication date Nov 14, 2013
- Zhongyi Xu
- G10 - MUSICAL INSTRUMENTS ACOUSTICS