Chenwei Yan

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Hoffman Estates, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Prepaid billing support for simultaneous communication sessions in...
- Patent number 7,184,530
- Issue date Feb 27, 2007
- UTStarcom, Inc.
- Chandra Warrier
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
Prepaid billing support for simultaneous communication sessions in...
- Publication number 20040017905
- Publication date Jan 29, 2004
- 3Com Corporation
- Chandra Warrier
- G06 - COMPUTING CALCULATING COUNTING