Wenfa Qi

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Watermarking image block division method and device for western lan...
- Patent number 9,111,341
- Issue date Aug 18, 2015
- Peking University Founder Group Co., Ltd.
- Gaoyang Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method and system for document printing management and control, and...
- Patent number 8,976,383
- Issue date Mar 10, 2015
- Peking University Founder Group Co., Ltd.
- Wenfa Qi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of document protection
- Patent number 8,120,795
- Issue date Feb 21, 2012
- Peking University Founder Group Co., Ltd.
- Wenfa Qi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Methods and apparatus for embedding and detecting digital watermark...
- Patent number 8,107,129
- Issue date Jan 31, 2012
- Peking University Founder Group Co., Ltd.
- Bin Yang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
WATERMARKING IMAGE BLOCK DIVISION METHOD AND DEVICE FOR WESTERN LAN...
- Publication number 20140003649
- Publication date Jan 2, 2014
- PEKING UNIVERSITY FOUNDER GROUP CO., LTD.
- Gaoyang Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
METHOD AND SYSTEM FOR DOCUMENT PRINTING MANAGEMENT AND CONTROL, AND...
- Publication number 20130335785
- Publication date Dec 19, 2013
- PEKING UNIVERSITY FOUNDER GROUP CO., LTD.
- Wenfa Qi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Method of document protection
- Publication number 20090257076
- Publication date Oct 15, 2009
- Peking University Founder Group Co. Ltd.
- Wenfa Qi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Methods and Apparatus for Embedding and Detecting Digital Watermark...
- Publication number 20080297853
- Publication date Dec 4, 2008
- PEKING UNIVERSITY FOUNDER GROUP CO., LTD.
- Bin Yang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE