The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2011
Filed:
Jan. 23, 2008
Vishwanth Tumkur Ramarao, Sunnyvale, CA (US);
Abhishek Kumar Pandey, Katihar, IN;
Raghav Jeyaraman, Sunnyvale, CA (US);
Vishwanth Tumkur Ramarao, Sunnyvale, CA (US);
Abhishek Kumar Pandey, Katihar, IN;
Raghav Jeyaraman, Sunnyvale, CA (US);
Yahoo! Inc., Sunnyvale, CA (US);
Abstract
Learning to, and detecting spam messages using a multi-stage combination of probability calculations based on individual and aggregate training sets of previously identified messages. During a preliminary phase, classifiers are trained, lower and upper limit probabilities, and a combined probability threshold are iteratively determined using a multi-stage combination of probability calculations based on minor and major subsets of messages previously categorized as valid or spam. During a live phase, a first stage classifier uses only a particular subset, and a second stage classifier uses a master set of previously categorized messages. If a newly received message can not be categorized with certainty by the first stage classifier, and a computed first stage probability is within the previously determined lower and upper limits, first and second stage probabilities are combined. If the combined probability is greater than the previously determined combined probability threshold, the received message is marked as spam.