CHUAN-CHUN MA

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TAOYUAN COUNTY, TW

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Patents Grantslast 30 patents

Information Patent Grant
Headphone sound-generating structure and method of assembling same
- Patent number 8,699,740
- Issue date Apr 15, 2014
- Fortune Grand Technology Inc.
- Hsin-Yuan Chiang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
HEADPHONE SOUND-GENERATING STRUCTURE AND METHOD OF ASSEMBLING SAME
- Publication number 20130022225
- Publication date Jan 24, 2013
- FORTUNE GRAND TECHNOLOGY INC.
- HSIN-YUAN CHIANG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE