Inventor · disambiguated record
Seiji Hijikata
Also filed as: HIJIKATA SEIJI
43 granted patents·1 pending application·146 citations·filing 2008–2023
97Inventor score
Files withHITACHI CONSTRUCTION MACH CO39FUJISHIMA KAZUO1HIJIKATA SEIJI1HITACHI CONSTRUCTION MACHINERY1ITO TOSHIHARU1
Top patents by PatentIndex Score
44 records- 0196US9926950B2Hydraulic system for construction machineryHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Mar 27, 2018·10 cites·4 claims
- 0294US10344458B2Hydraulic Drive System for work machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Jul 9, 2019·10 cites·5 claims
- 0394US10329739B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Jun 25, 2019·7 cites·4 claims
- 0491US10787790B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Sep 29, 2020·5 cites·7 claims
- 0590US10066368B2Hydraulic fluid energy recovery apparatus for work machineHITACHI CONSTRUCTION MACH CO·Filed 2014·Granted Sep 4, 2018·8 cites·5 claims
- 0690US8659177B2Motive power regeneration system for working machineFUJISHIMA KAZUO·Filed 2012·Granted Feb 25, 2014·16 cites·5 claims
- 0788US11377822B2Hydraulic drive apparatusHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Jul 5, 2022·4 cites·4 claims
- 0888US10526768B2Hydraulic energy regeneration system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Jan 7, 2020·4 cites·8 claims
- 0987US10227997B2Hydraulic drive system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Mar 12, 2019·6 cites·9 claims
- 1087US10221871B2Construction machineryHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Mar 5, 2019·3 cites·1 claims
- 1187US9394670B2Construction machineHITACHI CONSTRUCTION MACHINERY·Filed 2015·Granted Jul 19, 2016·6 cites·12 claims
- 1285US9598842B2Construction machineryHITACHI CONSTRUCTION MACH CO·Filed 2013·Granted Mar 21, 2017·10 cites·9 claims
- 1383US10907666B2Hydraulic drive systemHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Feb 2, 2021·3 cites·10 claims
- 1482US10364550B2Hydraulic drive system of work machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Jul 30, 2019·3 cites·5 claims
- 1581US10995475B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2018·Granted May 4, 2021·2 cites·13 claims
- 1681US10584722B2Hydraulic fluid energy regeneration apparatus of work machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Mar 10, 2020·3 cites·11 claims
- 1781US10526767B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Jan 7, 2020·3 cites·8 claims
- 1880US10161108B2Hydraulic fluid energy recovery system for workHITACHI CONSTRUCTION MACH CO·Filed 2014·Granted Dec 25, 2018·7 cites·16 claims
- 1979US9284718B2Power regeneration device for operating machineHIJIKATA SEIJI·Filed 2012·Granted Mar 15, 2016·9 cites·7 claims
- 2075US10280593B2Hydraulic fluid energy regeneration device for work machineHITACHI CONSTRUCTION MACH CO·Filed 2014·Granted May 7, 2019·3 cites·9 claims
- 2174US9926951B2Energy regeneration system for construction machineHITACHI CONSTRUCTION MACH CO·Filed 2014·Granted Mar 27, 2018·5 cites·5 claims
- 2274US9574328B2Power regeneration device for working machine and working machineHITACHI CONSTRUCTION MACH CO·Filed 2012·Granted Feb 21, 2017·3 cites·12 claims
- 2372US11105070B2Hydraulic work machineHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Aug 31, 2021·1 cites·6 claims
- 2469US11149753B2Hydraulic energy recovery apparatus for working machineHITACHI CONSTRUCTION MACH CO·Filed 2018·Granted Oct 19, 2021·1 cites·4 claims
- 2569US10794044B2Work machine hydraulic control systemHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Oct 6, 2020·2 cites·8 claims
- 2668US10273658B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Apr 30, 2019·2 cites·3 claims
- 2768US8430614B2Post-installed anchorITO TOSHIHARU·Filed 2008·Granted Apr 30, 2013·4 cites·14 claims
- 2867US11946224B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2021·Granted Apr 2, 2024·0 cites·5 claims
- 2964US10301793B2Hydraulic drive system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2014·Granted May 28, 2019·3 cites·5 claims
- 3060US10280594B2Hydraulic energy regeneration system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted May 7, 2019·1 cites·10 claims
- 3159US10030361B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2014·Granted Jul 24, 2018·2 cites·6 claims
- 3257US11946492B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2021·Granted Apr 2, 2024·0 cites·6 claims
- 3357US11946226B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2021·Granted Apr 2, 2024·0 cites·3 claims
- 3455US12320098B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2023·Granted Jun 3, 2025·0 cites·5 claims
- 3555US12049744B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2022·Granted Jul 30, 2024·0 cites·1 claims
- 3652US12173475B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2021·Granted Dec 24, 2024·0 cites·3 claims
- 3751US12054918B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2021·Granted Aug 6, 2024·0 cites·4 claims
- 3848US12043983B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2021·Granted Jul 23, 2024·0 cites·8 claims
- 3948US12018458B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2021·Granted Jun 25, 2024·0 cites·4 claims
- 4045US2014137548A1Construction machineryNISHIKAWA SHINJI·Filed 2012·Application pending·0 cites
- 4144US12312770B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2021·Granted May 27, 2025·0 cites·4 claims
- 4243US10760246B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2018·Granted Sep 1, 2020·0 cites·5 claims
- 4342US10801532B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Oct 13, 2020·0 cites·8 claims
- 4437US10436229B2Hydraulic drive system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Oct 8, 2019·0 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →