Lei Zheng

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Sunnyvale, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
System and method for identifying abusive account registration
- Patent number 9,838,403
- Issue date Dec 5, 2017
- EXCALIBUR IP, LLC
- Lei Zheng
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Detection of outbound sending of spam
- Patent number 8,868,663
- Issue date Oct 21, 2014
- Yahoo! Inc.
- Bhasker Hariharan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for identifying abusive account registration
- Patent number 8,862,524
- Issue date Oct 14, 2014
- Yahoo! Inc.
- Lei Zheng
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Detecting bulk fraudulent registration of email accounts
- Patent number 8,826,450
- Issue date Sep 2, 2014
- Yahoo! Inc.
- Bhasker Hariharan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Spam filtering based on statistics and token frequency modeling
- Patent number 8,364,766
- Issue date Jan 29, 2013
- Yahoo! Inc.
- Lei Zheng
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
SYSTEM AND METHOD FOR IDENTIFYING ABUSIVE ACCOUNT REGISTRATION
- Publication number 20140344929
- Publication date Nov 20, 2014
- Lei Zheng
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
SYSTEM AND METHOD FOR IDENTIFYING ABUSIVE ACCOUNT REGISTRATION
- Publication number 20140040170
- Publication date Feb 6, 2014
- Yahoo! Inc.
- Lei Zheng
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
SPAM FILTERING BASED ON STATISTICS AND TOKEN FREQUENCY MODELING
- Publication number 20100145900
- Publication date Jun 10, 2010
- Yahoo! Inc.
- Lei Zheng
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DETECTING BULK FRAUDULENT REGISTRATION OF EMAIL ACCOUNTS
- Publication number 20100076922
- Publication date Mar 25, 2010
- Yahoo! Inc.
- Bhasker Hariharan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DETECTION OF OUTBOUND SENDING OF SPAM
- Publication number 20100077040
- Publication date Mar 25, 2010
- Yahoo! Inc.
- Bhasker Hariharan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE