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:
Sep. 03, 2013
Filed:
Jul. 08, 2010
Alexei Starovoitov, Los Gatos, CA (US);
Alexei Starovoitov, Los Gatos, CA (US);
NetLogic Microsystems, Inc., Irvine, CA (US);
Abstract
A content search system determines whether an input string matches a negative regular expression that includes a negative pattern and an optional positive pattern. If the input string matches the positive pattern and does not match the negative pattern, a match between the input string and the negative regular expression is indicated. The positive pattern and the negative pattern may be compared to the input string in a single pass of the input string. The content search system may be implemented in a content addressable memory (CAM) device. The negative regular expression may specify a particular portion of the input string, such as a range of characters or bytes of a data packet, in which the negative pattern should not match for a match between the negative regular expression and the input pattern to be indicated.