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Yung-Sheng Chiang
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Taichung, TW
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Patents Grants
last 30 patents
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Patent Grant
Sights and methods of operation thereof
Patent number
9,239,213
Issue date
Jan 19, 2016
Sintai Optical (Shenzhen) Co., Ltd.
Yen-Chao Chen
F41 - WEAPONS
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Patent Grant
Sights and methods of operation thereof
Patent number
8,919,647
Issue date
Dec 30, 2014
Sintai Optical (Shenzhen) Co., Ltd.
Yen-Chao Chen
F41 - WEAPONS
Patents Applications
last 30 patents
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Patent Application
Sights and Methods of Operation Thereof
Publication number
20150069121
Publication date
Mar 12, 2015
SINTAI OPTICAL (SHENZHEN) CO., LTD.
Yen-Chao Chen
F41 - WEAPONS
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Patent Application
Sights and Methods of Operation Thereof
Publication number
20140166750
Publication date
Jun 19, 2014
Asia Optical International Ltd.
Yen-Chao Chen
F41 - WEAPONS