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Yi Ouyang
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Dongguan, CN
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Patents Grants
last 30 patents
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Patent Grant
Contact type electret condenser pickup
Patent number
8,090,125
Issue date
Jan 3, 2012
Transound Electronics Co., Ltd.
Hu-Ming Zheng
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
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Patent Application
Contact Type Electret Condenser Pickup
Publication number
20080063222
Publication date
Mar 13, 2008
Hu-Ming Zheng
H04 - ELECTRIC COMMUNICATION TECHNIQUE