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Hisashi Takatori
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Tokyo, JP
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Patents Grants
last 30 patents
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Patent Grant
Document retrieval method and document retrieval system
Patent number
7,047,238
Issue date
May 16, 2006
Hitachi, Ltd.
Katsumi Tada
G06 - COMPUTING CALCULATING COUNTING
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Patent Grant
Method and system for expanding document retrieval information
Patent number
7,010,519
Issue date
Mar 7, 2006
Hitachi, Ltd.
Katsumi Tada
G06 - COMPUTING CALCULATING COUNTING
Patents Applications
last 30 patents
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Patent Application
Document retrieval method and document retrieval system
Publication number
20040255218
Publication date
Dec 16, 2004
Hitachi, Ltd
Katsumi Tada
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Method and system for expanding document retrieval information
Publication number
20020169763
Publication date
Nov 14, 2002
Katsumi Tada
G06 - COMPUTING CALCULATING COUNTING