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Hsu-Ching Liao
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Taichung City, TW
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last 30 patents
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Patent Grant
Electret loudspeaker device
Patent number
8,855,339
Issue date
Oct 7, 2014
NATIONAL TAIWAN UNIVERSITY
Chih-Kung Lee
B32 - LAYERED PRODUCTS
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Patent Grant
Electret loudspeaker device
Patent number
8,699,730
Issue date
Apr 15, 2014
NATIONAL TAIWAN UNIVERSITY
Chih-Kung Lee
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
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Patent Application
FORMING A PIEZOELECTRIC MEMBRANE
Publication number
20140134418
Publication date
May 15, 2014
National Taiwan University
Chih-Kung Lee
H01 - BASIC ELECTRIC ELEMENTS
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Patent Application
ELECTRET LOUDSPEAKER DEVICE
Publication number
20130044905
Publication date
Feb 21, 2013
National Taiwan University
Chih-Kung Lee
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ELECTRET LOUDSPEAKER DEVICE
Publication number
20130044906
Publication date
Feb 21, 2013
National Taiwan University
Chih-Kung Lee
B32 - LAYERED PRODUCTS