Inventor · disambiguated record
Koichi Umezawa
Also filed as: UMEZAWA KOICHI
15 granted patents·1 pending application·808 citations·filing 1993–2016
95Inventor score
Files withHITACHI LTD9HITACHI HOME & LIFE SOLUTIONS2ODA MASARU2HAYASHI SHOJI1HITACHI LTD AND HITACHI VIDEO1
Top patents by PatentIndex Score
16 records- 0197US5491507AVideo telephone equipmentHITACHI LTD·Filed 1993·Granted Feb 13, 1996·420 cites·12 claims
- 0295US9061597B2Quick charger and quick charging system for electric vehicleODA MASARU·Filed 2012·Granted Jun 23, 2015·35 cites·14 claims
- 0395US6290360B1Liquid crystal projector, and projection lens unit, optical unit and cooling system for the sameHITACHI LTD·Filed 1998·Granted Sep 18, 2001·59 cites·8 claims
- 0493USD669026SElectric vehicle charging stationODA MASARU·Filed 2012·Granted Oct 16, 2012·79 cites·1 claims
- 0590US7207083B2Electric vacuum cleanerHITACHI HOME & LIFE SOLUTIONS·Filed 2003·Granted Apr 24, 2007·46 cites·7 claims
- 0686US6783245B2Liquid crystal projector, and projection lens unit, optical unit and cooling system for the sameHITACHI LTD·Filed 2001·Granted Aug 31, 2004·17 cites·4 claims
- 0784US7276099B2Electric vacuum cleanerHITACHI HOME & LIFE SOLUTIONS·Filed 2006·Granted Oct 2, 2007·22 cites·4 claims
- 0881USD690694SMagnetic disk storage unit for electronic computerUTSUKI TOSHIYUKI·Filed 2011·Granted Oct 1, 2013·31 cites·1 claims
- 0978US6824273B2Liquid crystal projector, and projection lens unit, optical unit and cooling system for the sameHITACHI LTD·Filed 2003·Granted Nov 30, 2004·9 cites·6 claims
- 1073USD730894SMagnetic disc storage unit for electronic computerHITACHI LTD·Filed 2013·Granted Jun 2, 2015·18 cites·1 claims
- 1165USD733134SMagnetic disk storage unit for electronic computerHITACHI LTD·Filed 2013·Granted Jun 30, 2015·13 cites·1 claims
- 1264US7152978B2Liquid crystal projector, and projection lens unit, optical unit and cooling system for the sameHITACHI LTD AND HITACHI VIDEO·Filed 2004·Granted Dec 26, 2006·5 cites·10 claims
- 1363US5819185APortable satellite communication apparatusHITACHI LTD·Filed 1996·Granted Oct 6, 1998·41 cites·47 claims
- 1460USD733135SMagnetic disk storage unit for electronic computerHITACHI LTD·Filed 2013·Granted Jun 30, 2015·11 cites·1 claims
- 1539USD809409SBreath alcohol content analyzerHITACHI LTD·Filed 2016·Granted Feb 6, 2018·2 cites·1 claims
- 1633US2006218744A1Electric vacuum cleanerHAYASHI SHOJI·Filed 2006·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →