Inventor · disambiguated record
Keiji Kawahara
Also filed as: KAWAHARA KEIJI
10 granted patents·3 pending applications·70 citations·filing 2001–2022
88Inventor score
Files withHITACHI LTD6HITACHI ASTEMO LTD2HIRAMITSU SHINJI1HITACHI AUTOMOTIVE SYSTEMS LTD1KOSHIZAKA ATSUSHI1
Top patents by PatentIndex Score
13 records- 0188US8016214B2Fuel injection valve and method for forming orifice thereofHITACHI LTD·Filed 2008·Granted Sep 13, 2011·18 cites·33 claims
- 0284US9000582B2Power semiconductor module and power conversion deviceHIRAMITSU SHINJI·Filed 2012·Granted Apr 7, 2015·10 cites·12 claims
- 0372US6580395B2High-frequency communication apparatus and method of manufacturing the sameHITACHI LTD·Filed 2001·Granted Jun 17, 2003·17 cites·9 claims
- 0467US12341390B2Stator of electric motor and manufacturing method for stator of electric motorHITACHI ASTEMO LTD·Filed 2021·Granted Jun 24, 2025·0 cites·11 claims
- 0566US6976381B2Fuel injector, nozzle body, and manufacturing method of cylindrical part equipped with fluid passageHITACHI LTD·Filed 2002·Granted Dec 20, 2005·7 cites·4 claims
- 0663US7874070B2Injection valve and method of making orificeHITACHI LTD·Filed 2006·Granted Jan 25, 2011·4 cites·10 claims
- 0759US6710745B2High-frequency communication apparatus and method of manufacturing the sameHITACHI LTD·Filed 2002·Granted Mar 23, 2004·8 cites·16 claims
- 0858US9095924B2Welded construction and resistance welding methodONOSE SHIN·Filed 2011·Granted Aug 4, 2015·2 cites·12 claims
- 0951US2024318701A1Joined body, method of manufacturing joined body, and shock absorberHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 1049US7315104B2Iron core and method of manufacturing the same and apparatus for manufacturing the sameHITACHI LTD·Filed 2004·Granted Jan 1, 2008·4 cites·10 claims
- 1140US2020258823A1Power semiconductor device and manufacturing method of the sameHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2018·Application pending·0 cites
- 1239US8302275B2Iron core and method of manufacturing the same and apparatus for manufacturing the sameKOSHIZAKA ATSUSHI·Filed 2007·Granted Nov 6, 2012·0 cites·3 claims
- 1335US2005014539A1High-frequency transceiver apparatus and method of manufacturing the sameFiled 2003·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →