Inventor · disambiguated record
Kouji Ishikawa
Also filed as: ISHIKAWA KOUJI
146 granted patents·12 pending applications·1,246 citations·filing 1989–2023
99Inventor score
Files withHITACHI CONSTRUCTION MACH CO55HITACHI CONSTRUCTION MACHINERY28NSK LTD27FUJITSU LTD3HAGIWARA NAOKI3
Top patents by PatentIndex Score
158 records- 0198US6251038B1Continuously variable transmission unitNSK LTD·Filed 1999·Granted Jun 26, 2001·159 cites·2 claims
- 0296US9926950B2Hydraulic system for construction machineryHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Mar 27, 2018·10 cites·4 claims
- 0394US10344458B2Hydraulic Drive System for work machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Jul 9, 2019·10 cites·5 claims
- 0493US10794046B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Oct 6, 2020·9 cites·5 claims
- 0592US8881506B2Hydraulic drive device of hydraulic operating machineNAKAMURA TSUYOSHI·Filed 2010·Granted Nov 11, 2014·13 cites·3 claims
- 0692US8516805B2Hydraulic driving device for work machineHAGIWARA NAOKI·Filed 2010·Granted Aug 27, 2013·13 cites·5 claims
- 0790US10309079B2Hydraulic control system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Jun 4, 2019·5 cites·4 claims
- 0890US7077781B2Power roller unit for toroidal-type continuously variable transmissionNSK LTD·Filed 2003·Granted Jul 18, 2006·33 cites·5 claims
- 0988US11377822B2Hydraulic drive apparatusHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Jul 5, 2022·4 cites·4 claims
- 1088US10526768B2Hydraulic energy regeneration system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Jan 7, 2020·4 cites·8 claims
- 1188USD693834SConstruction machine display with a graphic user interfaceITO EITARO·Filed 2011·Granted Nov 19, 2013·43 cites·1 claims
- 1287US10227997B2Hydraulic drive system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Mar 12, 2019·6 cites·9 claims
- 1387US10221871B2Construction machineryHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Mar 5, 2019·3 cites·1 claims
- 1487US9394670B2Construction machineHITACHI CONSTRUCTION MACHINERY·Filed 2015·Granted Jul 19, 2016·6 cites·12 claims
- 1587US9290908B2Hybrid construction machineHIROKI TAKENORI·Filed 2011·Granted Mar 22, 2016·13 cites·14 claims
- 1687US8700275B2Hybrid construction machine and auxiliary control device used thereinEDAMURA MANABU·Filed 2012·Granted Apr 15, 2014·17 cites·6 claims
- 1787US7584611B2Control system for hydraulic construction machineHITACHI CONSTRUCTION MACHINERY·Filed 2005·Granted Sep 8, 2009·14 cites·8 claims
- 1887US7562615B2Hydraulic working machineHITACHI CONSTRUCTION MACHINERY·Filed 2004·Granted Jul 21, 2009·23 cites·7 claims
- 1986US10480442B2Working machine and working machine monitoring systemHITACHI CONSTRUCTION MACH CO·Filed 2018·Granted Nov 19, 2019·2 cites·2 claims
- 2086US10253479B2Hydraulic system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Apr 9, 2019·6 cites·2 claims
- 2186US9133602B2Information management system for construction machineOOKI TAKATOSHI·Filed 2012·Granted Sep 15, 2015·7 cites·6 claims
- 2285US9598842B2Construction machineryHITACHI CONSTRUCTION MACH CO·Filed 2013·Granted Mar 21, 2017·10 cites·9 claims
- 2384US10801187B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Oct 13, 2020·6 cites·3 claims
- 2484US10472804B2Hydraulic control system of construction machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Nov 12, 2019·5 cites·4 claims
- 2583US10907666B2Hydraulic drive systemHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Feb 2, 2021·3 cites·10 claims
- 2683US7127887B2Oil pressure circuit for working machinesHITACHI CONSTRUCTION MACHINERY·Filed 2004·Granted Oct 31, 2006·31 cites·6 claims
- 2783US5326936AMounting device for mounting an electronic device on a substrate by the surface mounting technologyFUJITSU LTD·Filed 1991·Granted Jul 5, 1994·61 cites·15 claims
- 2882US10557251B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Feb 11, 2020·3 cites·2 claims
- 2982US10364550B2Hydraulic drive system of work machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Jul 30, 2019·3 cites·5 claims
- 3082US8650778B2Hydraulic drive device for hydraulic working machineOKANO YASUO·Filed 2010·Granted Feb 18, 2014·6 cites·6 claims
- 3181US10995475B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2018·Granted May 4, 2021·2 cites·13 claims
- 3281US10760245B2Drive control device for construction machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Sep 1, 2020·5 cites·6 claims
- 3381US10584722B2Hydraulic fluid energy regeneration apparatus of work machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Mar 10, 2020·3 cites·11 claims
- 3481US10526767B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Jan 7, 2020·3 cites·8 claims
- 3581US7543448B2Control system for hydraulic construction machineHITACHI CONSTRUCTION MACHINERY·Filed 2005·Granted Jun 9, 2009·12 cites·11 claims
- 3680US10330128B2Hydraulic control system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Jun 25, 2019·4 cites·5 claims
- 3780US10161108B2Hydraulic fluid energy recovery system for workHITACHI CONSTRUCTION MACH CO·Filed 2014·Granted Dec 25, 2018·7 cites·16 claims
- 3880US9057173B2Hybrid construction machineHIROKI TAKENORI·Filed 2011·Granted Jun 16, 2015·9 cites·4 claims
- 3980US8589038B2Hydraulic drive apparatus for construction equipmentHAGIWARA NAOKI·Filed 2010·Granted Nov 19, 2013·9 cites·8 claims
- 4079US9260838B2Control system for construction machineSAWADA SHINGO·Filed 2012·Granted Feb 16, 2016·7 cites·7 claims
- 4179US8959918B2Hybrid construction machineNISHIKAWA SHINJI·Filed 2011·Granted Feb 24, 2015·8 cites·11 claims
- 4278US9725878B2Hybrid-type construction machineHITACHI CONSTRUCTION MACH CO·Filed 2014·Granted Aug 8, 2017·6 cites·5 claims
- 4378US9181684B2Pump control unit for hydraulic systemOKANO YASUO·Filed 2011·Granted Nov 10, 2015·8 cites·2 claims
- 4478US8991184B2Hybrid construction machineOOKI TAKATOSHI·Filed 2012·Granted Mar 31, 2015·7 cites·10 claims
- 4578US8336443B2Hydraulic working machineABE TOSHIHIRO·Filed 2009·Granted Dec 25, 2012·8 cites·4 claims
- 4677US6740001B1Toroidal type continuously variable transmissionNSK LTD·Filed 2000·Granted May 25, 2004·17 cites·6 claims
- 4775US10774502B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Sep 15, 2020·3 cites·4 claims
- 4875US10280593B2Hydraulic fluid energy regeneration device for work machineHITACHI CONSTRUCTION MACH CO·Filed 2014·Granted May 7, 2019·3 cites·9 claims
- 4975US10006473B2Hybrid construction machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Jun 26, 2018·2 cites·4 claims
- 5074US9341198B2Hydraulic drive device for working machineNAKAMURA TSUYOSHI·Filed 2012·Granted May 17, 2016·6 cites·22 claims
Showing the top 50 of 158 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →