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.

Date of Patent:
Jul. 12, 1994

Filed:

Nov. 13, 1992
Applicant:
Inventors:

Brian Ta-Cheng Hou, Freehold, NJ (US);

Craig D Cohen, Merrick, NY (US);

James A Pasco-Anderson, Needham, MA (US);

Michael Gutman, Newton, MA (US);

Assignee:

Codex Corporation, Mansfield, MA (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395800 ; 3642319 ; 3642292 ; 3642592 ; 364259 ; 382 14 ;
Abstract

A variable length string matcher finds the longest string in a stored sequence of data elements (e.g., in a history buffer) that matches a string in a given sequence of data elements. The matcher includes circuitry that operates iteratively to compare data elements of the strings and determine the longest matching string based on when an iteration does not result in issuance of a match signal. In another aspect, the history buffer is an associative content addressable memory (CAM), and the string matcher uses absolute addressing of the CAM to determine the longest matching string.


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