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:
Dec. 28, 2004
Filed:
Oct. 19, 1999
Hideki Nishimura, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The present invention produces class-specific key words from a document set. In particular, an importance of a word is defined to take into account the number of documents in a corresponding class. A class may be for example, a class of author. An importance value of a word is based on a ratio of the count value of a word in a corresponding class to the number of documents in the class, less the ratio of the count value of the word in other classes to the number of documents in the other classes. Words are sorted by importance in each class. A characteristic key word in each class may be derived from the target document set. In an alternative embodiment, instead of a difference in ratios, the first ratio is divided by the second ratio. By using the alternative approach to calculating importance, the variation in the magnitude of the importance will not be effected by the number of documents.