Ningsheng Liu

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Docbase management system and method for extending docbase manageme...
- Patent number 8,732,216
- Issue date May 20, 2014
- Sursen Corp.
- Xu Guo
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Embedding and detecting hidden information
- Patent number 8,538,068
- Issue date Sep 17, 2013
- Sursen Corp.
- Donglin Wang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for storing document data in docbase managemen...
- Patent number 8,423,521
- Issue date Apr 16, 2013
- Sursen Corp.
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method for query based on layout information
- Patent number 8,386,943
- Issue date Feb 26, 2013
- Sursen Corp.
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method and apparatus for implementing electronic seal
- Patent number 8,386,793
- Issue date Feb 26, 2013
- Sursen Corp.
- Donglin Wang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Embedding and detecting hidden information
- Patent number 8,311,265
- Issue date Nov 13, 2012
- Beijing Sursen International Information Tech Co.
- Donglin Wang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Embedding and Detecting Hidden Information
- Publication number 20130028466
- Publication date Jan 31, 2013
- SURSEN CORP.
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Method for query based on layout information
- Publication number 20100287187
- Publication date Nov 11, 2010
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Method and apparatus for storing document data in docbase managemen...
- Publication number 20100146005
- Publication date Jun 10, 2010
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Method and apparatus for implementing electronic seal
- Publication number 20100082994
- Publication date Apr 1, 2010
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Docbase management system and method for extending docbase manageme...
- Publication number 20090187604
- Publication date Jul 23, 2009
- Xu Guo
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
EMBEDDING AND DETECTING HIDDEN INFORMATION
- Publication number 20080310672
- Publication date Dec 18, 2008
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING