Changwei Liu

Person

Beijing, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Method and system for processing document on layers
- Patent number 8,756,492
- Issue date Jun 17, 2014
- Sursen Corporation
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
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
Document processing system and method therefor
- Patent number 8,645,344
- Issue date Feb 4, 2014
- Sursen Corporation
- Donglin Wang
- 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
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
Information Patent Grant
Method of hierarchical processing of a document and system therefor
- Patent number 8,171,389
- Issue date May 1, 2012
- Sursen Corp.
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
METHOD AND SYSTEM FOR DOCUMENT DATA SECURITY MANAGEMENT
- Publication number 20130174268
- Publication date Jul 4, 2013
- SURSEN CORP.
- Donglin WANG
- G06 - COMPUTING CALCULATING COUNTING
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 and system for processing document on layers
- Publication number 20120173964
- Publication date Jul 5, 2012
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DOCUMENT DATA SECURITY MANAGEMENT METHOD AND SYSTEM THEREFOR
- Publication number 20090320141
- Publication date Dec 24, 2009
- SURSEN CORP.
- 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
Information Patent Application
DOCUMENT PROCESSING SYSTEM AND METHOD THEREFOR
- Publication number 20080270464
- Publication date Oct 30, 2008
- SURSEN CORP.
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DOCUMENT PROCESSING SYSTEM AND METHOD THEREFOR
- Publication number 20080270463
- Publication date Oct 30, 2008
- SURSEN CORP.
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DOCUMENT PROCESSING METHOD
- Publication number 20080263333
- Publication date Oct 23, 2008
- SURSEN CORP.
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
METHOD OF HIERARCHICAL PROCESSING OF A DOCUMENT AND SYSTEM THEREFOR
- Publication number 20080263068
- Publication date Oct 23, 2008
- SURSEN CORP.
- Donglin Wang
- G06 - COMPUTING CALCULATING COUNTING

Changwei Liu

Person

Patents Grantslast 30 patents

Method and system for processing document on layers

Docbase management system and method for extending docbase manageme...

Document processing system and method therefor

Embedding and detecting hidden information

Embedding and detecting hidden information

Method of hierarchical processing of a document and system therefor

Patents Applicationslast 30 patents

METHOD AND SYSTEM FOR DOCUMENT DATA SECURITY MANAGEMENT

Embedding and Detecting Hidden Information

Method and system for processing document on layers

DOCUMENT DATA SECURITY MANAGEMENT METHOD AND SYSTEM THEREFOR

Docbase management system and method for extending docbase manageme...

EMBEDDING AND DETECTING HIDDEN INFORMATION

DOCUMENT PROCESSING SYSTEM AND METHOD THEREFOR

DOCUMENT PROCESSING SYSTEM AND METHOD THEREFOR

DOCUMENT PROCESSING METHOD

METHOD OF HIERARCHICAL PROCESSING OF A DOCUMENT AND SYSTEM THEREFOR