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Allan Chiwan Cheung
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Lexington, KY, US
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last 30 patents
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Patent Grant
Combined color halftoning
Patent number
6,363,172
Issue date
Mar 26, 2002
Lexmark International, Inc.
Allan Chiwan Cheung
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital halftoning with error diffusion
Patent number
6,307,647
Issue date
Oct 23, 2001
Lexmark International, Inc.
Allan Chiwan Cheung
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Combined color halftoning
Patent number
5,973,803
Issue date
Oct 26, 1999
Lexmark International, Inc.
Allan Chiwan Cheung
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for color halftoning using different halftonin...
Patent number
5,930,010
Issue date
Jul 27, 1999
Lexmark International, Inc.
Allan Chiwan Cheung
H04 - ELECTRIC COMMUNICATION TECHNIQUE