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:
Jul. 06, 2010
Filed:
Apr. 20, 2007
Kentaro Chigusa, Tokyo, JP;
Tadataka Matsubayashi, Machida, JP;
Kazutomo Ushijima, Fuchu, JP;
Tsuyoshi Sudo, Ichikawa, JP;
Kentaro Chigusa, Tokyo, JP;
Tadataka Matsubayashi, Machida, JP;
Kazutomo Ushijima, Fuchu, JP;
Tsuyoshi Sudo, Ichikawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A retrieval apparatusfor searching document data comprises a document storage areafor storing documents to be searched and a document management tablefor storing a data size of a document such that the data size is associated with a document ID for identifying the document. The retrieval apparatusreads out from the document management table data sizes of documents to be searched, and calculates a retrieval document size by adding up the read out data sizes, and calculates an estimated time ttaken for a retrieval process by the index scan method and an estimated time ttaken for the retrieval process by the text scan method, based on the retrieval document size. The retrieval apparatuscompares the estimated times tand t, and decides which method to use for a retrieval process, the index scan method or the text scan method.