Inventor

TSURUGA YASUTAKA

JP63 patents

⚠️ This page may combine multiple inventors who share the name “TSURUGA YASUTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI CONSTRUCTION MACH CO

27 patents

US10329739B2Jun 25, 2019

Construction machine

HITACHI CONSTRUCTION MACH CO7 citations84

US11718977B2Aug 8, 2023

Work machine

HITACHI CONSTRUCTION MACH CO4 citations74

US11454004B2Sep 27, 2022

Work machine

HITACHI CONSTRUCTION MACH CO2 citations73

US11377822B2Jul 5, 2022

Hydraulic drive apparatus

HITACHI CONSTRUCTION MACH CO4 citations73

US11230821B2Jan 25, 2022

Construction machine

HITACHI CONSTRUCTION MACH CO3 citations73

US11193254B2Dec 7, 2021

Construction machine

HITACHI CONSTRUCTION MACH CO3 citations73

US11149410B2Oct 19, 2021

Work machine with automatic and manual operating control

HITACHI CONSTRUCTION MACH CO2 citations73

US11124166B2Sep 21, 2021

Vehicular brake system

HITACHI CONSTRUCTION MACH CO2 citations73

US10995475B2May 4, 2021

Construction machine

HITACHI CONSTRUCTION MACH CO2 citations73

US10907666B2Feb 2, 2021

Hydraulic drive system

HITACHI CONSTRUCTION MACH CO3 citations73

US10626575B2Apr 21, 2020

Control system for construction machine

HITACHI CONSTRUCTION MACH CO3 citations73

US10604914B2Mar 31, 2020

Control system for hydraulic construction machine

HITACHI CONSTRUCTION MACH CO3 citations73

US10533303B2Jan 14, 2020

Construction machine to adjust operation reaction force of an operating lever

HITACHI CONSTRUCTION MACH CO3 citations73

US10450725B2Oct 22, 2019

Construction machine

HITACHI CONSTRUCTION MACH CO4 citations73

US10450722B2Oct 22, 2019

Control system for construction machine

HITACHI CONSTRUCTION MACH CO3 citations73

US10435870B2Oct 8, 2019

Construction machine

HITACHI CONSTRUCTION MACH CO4 citations73

US10400797B2Sep 3, 2019

Hydraulic control system for working machine

HITACHI CONSTRUCTION MACH CO5 citations73

US10273658B2Apr 30, 2019

Construction machine

HITACHI CONSTRUCTION MACH CO2 citations73

US9890801B2Feb 13, 2018

Hydraulic drive system for construction machine

HITACHI CONSTRUCTION MACH CO7 citations73

US11739502B2Aug 29, 2023

Work machine

HITACHI CONSTRUCTION MACH CO2 citations72

US11946224B2Apr 2, 2024

Construction machine

HITACHI CONSTRUCTION MACH CO0 citations62

US11391020B2Jul 19, 2022

Work machine

HITACHI CONSTRUCTION MACH CO2 citations62

US12276087B2Apr 15, 2025

Work machine

HITACHI CONSTRUCTION MACH CO0 citations52

US12173475B2Dec 24, 2024

Work machine

HITACHI CONSTRUCTION MACH CO0 citations52

US12043983B2Jul 23, 2024

Construction machine

HITACHI CONSTRUCTION MACH CO0 citations52

US12018458B2Jun 25, 2024

Construction machine

HITACHI CONSTRUCTION MACH CO0 citations52

US11946492B2Apr 2, 2024

Work machine

HITACHI CONSTRUCTION MACH CO0 citations52

HITACHI CONSTRUCTION MACHINERY

10 patents

US6408622B1Jun 25, 2002

Hydraulic drive device

HITACHI CONSTRUCTION MACHINERY45 citations91

US7798738B2Sep 21, 2010

Swivel joint for construction machine

HITACHI CONSTRUCTION MACHINERY9 citations84

US6192681B1Feb 27, 2001

Hydraulic drive apparatus

HITACHI CONSTRUCTION MACHINERY18 citations84

US6105367AAug 22, 2000

Hydraulic drive system

HITACHI CONSTRUCTION MACHINERY20 citations84

US6651428B2Nov 25, 2003

Hydraulic drive device

HITACHI CONSTRUCTION MACHINERY13 citations83

US6584770B2Jul 1, 2003

Hydraulic drive system

HITACHI CONSTRUCTION MACHINERY17 citations83

US6526747B2Mar 4, 2003

Hydraulic driving device

HITACHI CONSTRUCTION MACHINERY20 citations82

US6176126B1Jan 23, 2001

Engine speed control system for construction machine

HITACHI CONSTRUCTION MACHINERY8 citations73

US6397591B1Jun 4, 2002

Hydraulic driving unit

HITACHI CONSTRUCTION MACHINERY10 citations72

US6772590B2Aug 10, 2004

Hydraulic driving device

HITACHI CONSTRUCTION MACHINERY6 citations63

HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD

6 patents

US10287751B2May 14, 2019

Hydraulic drive system for working machine including track device of crawler type

HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD3 citations73

US10107311B2Oct 23, 2018

Hydraulic drive system for construction machine

HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD4 citations73

US10060451B2Aug 28, 2018

Hydraulic drive system for construction machine

HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD4 citations73

US9845589B2Dec 19, 2017

Hydraulic drive system for construction machine

HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD6 citations73

US10215198B2Feb 26, 2019

Hydraulic drive system for construction machine

HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD4 citations71

US9976283B2May 22, 2018

Hydraulic drive system for construction machine

HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD6 citations71

TAKAHASHI KIWAMU

2 patents

US8857169B2Oct 14, 2014

Hydraulic drive system for construction machine

TAKAHASHI KIWAMU12 citations82

US8919109B2Dec 30, 2014

Hydraulic drive system for construction machine having exhaust gas purification device

TAKAHASHI KIWAMU3 citations60

TSURUGA YASUTAKA

2 patents

US9187880B2Nov 17, 2015

Electric drive unit for construction machine

TSURUGA YASUTAKA15 citations81

US9347203B2May 24, 2016

Electric drive unit for construction machine

TSURUGA YASUTAKA5 citations70

MORI KAZUSHIGE

1 patent

US9200431B2Dec 1, 2015

Hydraulic drive system for construction machine

MORI KAZUSHIGE10 citations82

HANSHIN HORO CO LTD

1 patent

US6915980B2Jul 12, 2005

Winding and cutting machine for rolled paper

HANSHIN HORO CO LTD12 citations80

UMIZAKI YUUKI

1 patent

US8413676B2Apr 9, 2013

Construction machine

UMIZAKI YUUKI8 citations78

Showing the top 50 of 63 patents by PatentIndex Score.