Inventor
ISHIKAWA KOUJI
JP146 patents
⚠️ This page may combine multiple inventors who share the name “ISHIKAWA KOUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI CONSTRUCTION MACHINERY
14 patentsUS7127887B2Oct 31, 2006
Oil pressure circuit for working machines
HITACHI CONSTRUCTION MACHINERY31 citations93
US5974796ANov 2, 1999
Hydraulic circuit system for hydraulic working machine
HITACHI CONSTRUCTION MACHINERY29 citations93
US5940997AAug 24, 1999
Hydraulic circuit system for hydraulic working machine
HITACHI CONSTRUCTION MACHINERY33 citations93
US7562615B2Jul 21, 2009
Hydraulic working machine
HITACHI CONSTRUCTION MACHINERY23 citations92
US5930996AAug 3, 1999
Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump
HITACHI CONSTRUCTION MACHINERY28 citations92
US5911506AJun 15, 1999
Control system for prime mover and hydraulic pump of hydraulic construction machine
HITACHI CONSTRUCTION MACHINERY37 citations92
US5890303AApr 6, 1999
Hydraulic by-pass circuit for a hydraulic shovel
HITACHI CONSTRUCTION MACHINERY29 citations92
US5848531ADec 15, 1998
Hydraulic drive system for construction machines
HITACHI CONSTRUCTION MACHINERY36 citations92
US6220028B1Apr 24, 2001
Hydraulic drive system for hydraulic work vehicle
HITACHI CONSTRUCTION MACHINERY30 citations91
US7584611B2Sep 8, 2009
Control system for hydraulic construction machine
HITACHI CONSTRUCTION MACHINERY14 citations84
US7543448B2Jun 9, 2009
Control system for hydraulic construction machine
HITACHI CONSTRUCTION MACHINERY12 citations84
US7255088B2Aug 14, 2007
Engine control system for construction machine
HITACHI CONSTRUCTION MACHINERY10 citations84
US6619037B1Sep 16, 2003
Hydraulic driving device of civil engineering and construction machinery
HITACHI CONSTRUCTION MACHINERY13 citations84
US5907951AJun 1, 1999
Hydraulic control system for construction machine
HITACHI CONSTRUCTION MACHINERY16 citations74
NSK LTD
7 patentsUS6251038B1Jun 26, 2001
Continuously variable transmission unit
NSK LTD159 citations99
US7077781B2Jul 18, 2006
Power roller unit for toroidal-type continuously variable transmission
NSK LTD33 citations93
US6740001B1May 25, 2004
Toroidal type continuously variable transmission
NSK LTD17 citations84
US6752735B2Jun 22, 2004
Toroidal-type continuously variable transmission
NSK LTD8 citations74
US6375595B1Apr 23, 2002
Toroidal type continuously variable transmission
NSK LTD13 citations74
US6203466B1Mar 20, 2001
Continuously variable transmission apparatus
NSK LTD9 citations74
US6074324AJun 13, 2000
Toroidal type continuously variable transmission
NSK LTD13 citations74
HITACHI CONSTRUCTION MACH CO
7 patentsUS10794046B2Oct 6, 2020
Work machine
HITACHI CONSTRUCTION MACH CO9 citations84
US10344458B2Jul 9, 2019
Hydraulic Drive System for work machine
HITACHI CONSTRUCTION MACH CO10 citations84
US10161108B2Dec 25, 2018
Hydraulic fluid energy recovery system for work
HITACHI CONSTRUCTION MACH CO7 citations84
US9926950B2Mar 27, 2018
Hydraulic system for construction machinery
HITACHI CONSTRUCTION MACH CO10 citations84
US9598842B2Mar 21, 2017
Construction machinery
HITACHI CONSTRUCTION MACH CO10 citations83
US11391011B2Jul 19, 2022
Hydraulic excavator
HITACHI CONSTRUCTION MACH CO2 citations73
US11377822B2Jul 5, 2022
Hydraulic drive apparatus
HITACHI CONSTRUCTION MACH CO4 citations73
FUJITSU LTD
2 patentsITO EITARO
2 patentsOOKI TAKATOSHI
2 patentsHIROKI TAKENORI
2 patentsHAGIWARA NAOKI
2 patentsMITSUBISHI ELECTRIC CORP
1 patentIMURA SHINYA
1 patentNAKAMURA TSUYOSHI
1 patentNAKAMURA KAZUNORI
1 patentOKANO YASUO
1 patentNISHIKAWA SHINJI
1 patentEDAMURA MANABU
1 patentABE TOSHIHIRO
1 patentKIMURA TOMOKI
1 patentARIGA NOBUEI
1 patentKOWATARI YOICHI
1 patentSAWADA SHINGO
1 patentShowing the top 50 of 146 patents by PatentIndex Score.