Tianwei Chen

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Berlin, DE

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Patents Grantslast 30 patents

Information Patent Grant
Verifying check-in authentication by using an access authentication...
- Patent number 7,171,202
- Issue date Jan 30, 2007
- Siemens Aktiengesellschaft
- Tianwei Chen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Verifying check-in authentication by using an access authentication...
- Publication number 20050079866
- Publication date Apr 14, 2005
- Tianwei Chen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE