Hai Xin

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Tearing and conformal transformation human interactive proof
- Patent number 8,359,394
- Issue date Jan 22, 2013
- Microsoft Corp.
- Weisheng Li
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
TEARING AND CONFORMAL TRANSFORMATION HUMAN INTERACTIVE PROOF
- Publication number 20110072498
- Publication date Mar 24, 2011
- Microsoft Corporation
- Weisheng Li
- G06 - COMPUTING CALCULATING COUNTING