Inventor

IWAKI KOJI

JP55 patents

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

KANZAKI KOKYUKOKI MFG CO LTD

39 patents

US7690470B2Apr 6, 2010

Hydrostatic transaxle

KANZAKI KOKYUKOKI MFG CO LTD21 citations92

US7431122B2Oct 7, 2008

Hydraulic axle-drive device

KANZAKI KOKYUKOKI MFG CO LTD16 citations92

US7415823B2Aug 26, 2008

Hydraulically driven working vehicle and hydraulic transaxle

KANZAKI KOKYUKOKI MFG CO LTD20 citations92

US9475384B2Oct 25, 2016

Powertrain system for vehicle

KANZAKI KOKYUKOKI MFG CO LTD8 citations84

US9248737B2Feb 2, 2016

Transmission for working vehicle

KANZAKI KOKYUKOKI MFG CO LTD19 citations84

US8381853B2Feb 26, 2013

Electric vehicle

KANZAKI KOKYUKOKI MFG CO LTD16 citations84

US7980339B2Jul 19, 2011

Power transmission system of hydraulically driven working vehicle

KANZAKI KOKYUKOKI MFG CO LTD8 citations84

US7900735B2Mar 8, 2011

Hydrostatic transaxle

KANZAKI KOKYUKOKI MFG CO LTD8 citations84

US7726425B2Jun 1, 2010

Power transmission system of hydraulically driven working vehicle

KANZAKI KOKYUKOKI MFG CO LTD9 citations84

US7588103B2Sep 15, 2009

Hydrostatic transaxle and hydraulically driven vehicle

KANZAKI KOKYUKOKI MFG CO LTD12 citations84

US9797485B2Oct 24, 2017

Belt type continuously variable transmission device

KANZAKI KOKYUKOKI MFG CO LTD7 citations82

US10888047B2Jan 12, 2021

Parking brake apparatus for vehicle

KANZAKI KOKYUKOKI MFG CO LTD6 citations73

US9487085B2Nov 8, 2016

Transaxle and working vehicle equipped with the transaxle

KANZAKI KOKYUKOKI MFG CO LTD6 citations73

US8758195B2Jun 24, 2014

Traveling speed control system for work vehicle

KANZAKI KOKYUKOKI MFG CO LTD4 citations73

US11293528B2Apr 5, 2022

Working vehicle

KANZAKI KOKYUKOKI MFG CO LTD2 citations72

US10591036B2Mar 17, 2020

Transaxle

KANZAKI KOKYUKOKI MFG CO LTD6 citations70

US11644091B2May 9, 2023

Hydromechanical continuously variable speed transmission

KANZAKI KOKYUKOKI MFG CO LTD2 citations69

US9964126B2May 8, 2018

Transaxle including brake

KANZAKI KOKYUKOKI MFG CO LTD6 citations69

US10711887B2Jul 14, 2020

Transaxle and vehicle with it

KANZAKI KOKYUKOKI MFG CO LTD1 citations62

US10408278B2Sep 10, 2019

Clutch system hydraulically controlling axial slide action of clutch slider

KANZAKI KOKYUKOKI MFG CO LTD1 citations62

US7980351B2Jul 19, 2011

Hydraulic transaxle

KANZAKI KOKYUKOKI MFG CO LTD5 citations62

US7647770B2Jan 19, 2010

Hydraulically driven working vehicle and hydraulic transaxle

KANZAKI KOKYUKOKI MFG CO LTD4 citations62

US5868215AFeb 9, 1999

Vibration isolating support structure for an axle case

KANZAKI KOKYUKOKI MFG CO LTD5 citations62

US11933391B2Mar 19, 2024

HST and transmission device

KANZAKI KOKYUKOKI MFG CO LTD1 citations61

US11841067B2Dec 12, 2023

Transmission structure

KANZAKI KOKYUKOKI MFG CO LTD1 citations61

US11767904B2Sep 26, 2023

Transmission structure and working vehicle

KANZAKI KOKYUKOKI MFG CO LTD0 citations61

US11572939B2Feb 7, 2023

Transmission structure and working vehicle

KANZAKI KOKYUKOKI MFG CO LTD0 citations61

US11204097B2Dec 21, 2021

Transmission structure and working vehicle

KANZAKI KOKYUKOKI MFG CO LTD0 citations61

US11535208B2Dec 27, 2022

Hydraulic transaxle

KANZAKI KOKYUKOKI MFG CO LTD0 citations52

US12473964B2Nov 18, 2025

HST and transmission

KANZAKI KOKYUKOKI MFG CO LTD0 citations51

US12072008B2Aug 27, 2024

Transmission structure and working vehicle

KANZAKI KOKYUKOKI MFG CO LTD0 citations51

US12000467B2Jun 4, 2024

Stepless speed change structure

KANZAKI KOKYUKOKI MFG CO LTD0 citations51

US11547051B2Jan 10, 2023

Hydrostatic transaxle

KANZAKI KOKYUKOKI MFG CO LTD0 citations51

US10895249B2Jan 19, 2021

Hydraulic transaxle

KANZAKI KOKYUKOKI MFG CO LTD0 citations51

US12510144B2Dec 30, 2025

Transmission structure

KANZAKI KOKYUKOKI MFG CO LTD0 citations49

US11668381B2Jun 6, 2023

Transmission structure

KANZAKI KOKYUKOKI MFG CO LTD0 citations49

US12578008B2Mar 17, 2026

Hydrostatic transaxle

KANZAKI KOKYUKOKI MFG CO LTD0 citations48

US11796041B2Oct 24, 2023

Planetary gear assembly, power-split stepless transmission, and transmission structure

KANZAKI KOKYUKOKI MFG CO LTD0 citations48

US9453519B2Sep 27, 2016

Transaxle

KANZAKI KOKYUKOKI MFG CO LTD1 citations48

IWAKI KOJI

4 patents

US7036622B2May 2, 2006

Tractor frame and method of manufacture therefor

IWAKI KOJI24 citations92

US8337353B2Dec 25, 2012

Traveling system transmission structure for vehicle

IWAKI KOJI8 citations83

US8459398B2Jun 11, 2013

Wheel motor device

IWAKI KOJI3 citations62

US8109355B2Feb 7, 2012

Hydrostatic transaxle and hydraulically driven vehicle

IWAKI KOJI1 citations51

ISHII NORIHIRO

1 patent

US8806864B2Aug 19, 2014

Transmission

ISHII NORIHIRO9 citations84

SUGIMOTO HIROSHI

1 patent

US8281892B2Oct 9, 2012

Working vehicle and HST unit

SUGIMOTO HIROSHI10 citations82

KITA TSUYOSHI

1 patent

US8800279B2Aug 12, 2014

Hydraulic transmission system for zero-turn vehicle

KITA TSUYOSHI16 citations75

OOUCHIDA TAKESHI

1 patent

US8838348B2Sep 16, 2014

Drive system control device for working vehicle

OOUCHIDA TAKESHI4 citations67

KANENOBU HIDEKI

1 patent

US8887500B2Nov 18, 2014

Hydraulic transaxle

KANENOBU HIDEKI3 citations57

SAKAKURA SHINYA

1 patent

US8205708B2Jun 26, 2012

Hydraulic transaxle

SAKAKURA SHINYA3 citations57

ISHINO FUMITOSHI

1 patent

US9334934B2May 10, 2016

Belt type continuously variable transmission

ISHINO FUMITOSHI1 citations46

Showing the top 50 of 55 patents by PatentIndex Score.