YAO RICHENG

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Taipei, TW

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Patents Grantslast 30 patents

Information Patent Grant
Loudspeaker structure
- Patent number 10,567,882
- Issue date Feb 18, 2020
- TYMPHANY ACOUSTIC TECHNOLOGY (HUIZHOU) CO., LTD.
- Changlin Guo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
LOUDSPEAKER STRUCTURE
- Publication number 20180063643
- Publication date Mar 1, 2018
- Premium Loudspeakers (Hui Zhou) Co., Ltd.
- GUO CHANGLIN
- H04 - ELECTRIC COMMUNICATION TECHNIQUE