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:
Nov. 21, 2006
Filed:
Jan. 22, 2002
James W. Cooper, Wilton, CT (US);
Anni Coden, Riverdale, NY (US);
Eric W. Brown, New Fairfield, CT (US);
James W. Cooper, Wilton, CT (US);
Anni Coden, Riverdale, NY (US);
Eric W. Brown, New Fairfield, CT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and a method are described for rapidly determining document similarity among a set of documents, such as a set of documents obtained from an information retrieval (IR) system. A ranked list of the most important terms in each document is obtained using a phrase recognizer system. The list is stored in a database and is used to compute document similarity with a simple database query. If the number of terms found to not be contained in both documents is less than some predetermined threshold compared to the total number of terms in the document, these documents are determined to be very similar. It is shown that these techniques may be employed to accurately recognize that documents, that have been revised to contain parts of other documents, are still closely related to the original document. These teachings further provide for the computation of a document signature that can then be used to make a rapid comparison between documents that are likely to be identical.