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Yung-Cheng Hsieh
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Kou-Hu Shiang, TW
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Patents Grants
last 30 patents
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Patent Grant
Digital business card
Patent number
6,616,052
Issue date
Sep 9, 2003
Ritek Corporation
Tzu-Feng Tseng
G06 - COMPUTING CALCULATING COUNTING
Patents Applications
last 30 patents
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Patent Application
Digital data vending machine
Publication number
20020062171
Publication date
May 23, 2002
Tzu-Feng Tseng
G06 - COMPUTING CALCULATING COUNTING
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Patent Application
Apparent data erasure method
Publication number
20020062446
Publication date
May 23, 2002
Tzu-Feng Tseng
G06 - COMPUTING CALCULATING COUNTING
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Patent Application
Digital business card
Publication number
20020053595
Publication date
May 9, 2002
Tzu-Feng Tseng
G06 - COMPUTING CALCULATING COUNTING