Zong Wei Liu

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Key distribution in a conditional access system
- Patent number 7,296,159
- Issue date Nov 13, 2007
- International Business Machines Corporation
- Jian Zhang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Key distribution in a conditional access system
- Publication number 20040120529
- Publication date Jun 24, 2004
- International Business Machines Corporation
- Jian Zhang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE