Inventor
MATSUBAYASHI TADATAKA
JP20 patents
Patents
20 patentsUS6473754B1Oct 29, 2002
Method and system for extracting characteristic string, method and system for searching for relevant document using the same, storage medium for storing characteristic string extraction program, and storage medium for storing relevant document searching program
HITACHI LTD144 citations98
US6665668B1Dec 16, 2003
Document retrieval method and system and computer readable storage medium
HITACHI LTD144 citations97
US7054860B2May 30, 2006
Method and system for retrieving a document and computer readable storage medium
HITACHI LTD42 citations92
US7039636B2May 2, 2006
Document retrieval method and document retrieval system
HITACHI LTD23 citations92
US6865571B2Mar 8, 2005
Document retrieval method and system and computer readable storage medium
HITACHI LTD33 citations92
US6757676B1Jun 29, 2004
Text mining method and apparatus allowing a user to analyze contents of a document set from plural analysis axes
HITACHI LTD23 citations92
US6549898B1Apr 15, 2003
Method of and an apparatus for retrieving and delivering documents and a recording media on which a program for retrieving and delivering documents are stored
HITACHI LTD28 citations92
US6496820B1Dec 17, 2002
Method and search method for structured documents
HITACHI LTD28 citations92
US7130849B2Oct 31, 2006
Similarity-based search method by relevance feedback
HITACHI LTD50 citations91
US7231388B2Jun 12, 2007
Similar document retrieving method and system
HITACHI LTD24 citations90
US6665667B2Dec 16, 2003
Method of and an apparatus for retrieving and delivering documents and a recording media on which a program for retrieving and delivering documents are stored
HITACHI LTD14 citations83
US7200587B2Apr 3, 2007
Method of searching similar document, system for performing the same and program for processing the same
HITACHI LTD10 citations82
US7440938B2Oct 21, 2008
Method and apparatus for calculating similarity among documents
HITACHI LTD17 citations81
US6826567B2Nov 30, 2004
Registration method and search method for structured documents
HITACHI LTD9 citations73
US6738786B2May 18, 2004
Data display method and apparatus for use in text mining
HITACHI LTD9 citations73
US7558802B2Jul 7, 2009
Information retrieving system
HITACHI LTD7 citations72
US7333983B2Feb 19, 2008
Method of and an apparatus for retrieving and delivering documents and a recording media on which a program for retrieving and delivering documents are stored
HITACHI LTD2 citations62
US7689545B2Mar 30, 2010
System and method to enable parallel text search using in-charge index ranges
HITACHI LTD4 citations60
US7620614B2Nov 17, 2009
Method, program and apparatus for document retrieval system
HITACHI LTD0 citations35
US7752216B2Jul 6, 2010
Retrieval apparatus, retrieval method and retrieval program
HITACHI LTD0 citations34