Assignee
HITACHI SYSTEMS & SERVICES LTD
JP·3 granted patents·46 citations·filing 2001–2005
Top patents by PatentIndex Score
3 records- 0168US7047238B2Document retrieval method and document retrieval systemHITACHI SYSTEMS & SERVICES LTD·Filed 2003·Granted May 16, 2006·29 cites·21 claims
- 0263US7010519B2Method and system for expanding document retrieval informationHITACHI SYSTEMS & SERVICES LTD·Filed 2001·Granted Mar 7, 2006·16 cites·20 claims
- 0349US7653644B2Hierarchy structure data generating systemHITACHI SYSTEMS & SERVICES LTD·Filed 2005·Granted Jan 26, 2010·1 cites·12 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →