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Patent applications and USPTO patent grants for Cheung; Wah Sing Alex.The latest application filed is for "hidden image identification system, products, identification device and producing method".
Patent | Date |
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Hidden image identification system, products, identification device and producing method Grant 8,331,608 - Cheung December 11, 2 | 2012-12-11 |
Hidden image identification system, products, identification device and producing method App 20090324104 - Cheung; Wah Sing Alex | 2009-12-31 |
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