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Yao-Wen Chang
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Miaoli, TW
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last 30 patents
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Patent Grant
Optical scanner
Patent number
6,285,483
Issue date
Sep 4, 2001
Umax Data Systems Inc.
Ting Shia
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Device for holding and moving a contact image sensor
Patent number
6,091,516
Issue date
Jul 18, 2000
Umax Data Systems Inc.
Yao-Wen Chang
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Grant
Optical scanners with an improved chassis locking means
Patent number
5,769,515
Issue date
Jun 23, 1998
Umax Data Systems, Inc.
Yao-Wen Chang
H04 - ELECTRIC COMMUNICATION TECHNIQUE