Inventor
Kenji Hiraku
Inventor
Kasumigaura, JP
Overview
Patents· 43 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E02Fprimary
E02FDredging21%
F15BSystems acting by means of fluids in general20%
F04BPositive-displacement machines for liquids13%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof9%
F02DControlling combustion engines7%
G01NInvestigating or analysing materials by determining their chemical or physical properties6%
F16HGearing4%
Y10TTechnical subjects covered by former us classification4%
B01DSeparation2%
F16KValves2%
PatentTitleYear
11,118,328Construction machine202111,111,651Construction machine202110,947,699Construction machine202110,914,053Work machine202110,907,666Hydraulic drive system202110,900,435Drive unit of fuel injection device202110,889,964Drive system for construction machine202110,858,805Construction machine202010,829,908Construction machine202010,745,887Work machine202010,677,272Construction machine202010,655,740Work machine202010,415,215Drive system for construction machine201910,378,185Work machine201910,370,824Work machine201910,280,862Drive unit of fuel injection device201910,184,225Working machine20199,938,691Hydraulic system for work machine20189,879,405'Hydraulic driving system'20189,845,813Driving device for work machine and work machine equipped therewith20179,783,960'Driving device for work machine'20179,683,588'Hydraulic closed circuit system'20179,593,657'Drive unit of fuel injection device'20179,506,480'Apparatus for driving work machine'20169,410,543'Pump for liquid chromatograph, and liquid chromatograph'20168,885,843'Sound generator'20148,581,527'Mechanism for converting rotary motion into linear motion and lifting device'20138,573,088'Mechanism for converting rotational motion to linear motion'20138,567,279'Mechanism for converting rotary motion into linear motion'20138,551,423'Liquid supply device using check valve and reactive liquid chromatography system'20137,850,255'Electro-mechanical brake system and electro-mechanical brake apparatus used therefor'20107,789,642'Gear pump and method of producing the same'20107,588,423'Pump for liquid chromatograph'20097,063,513'Liquid chromatograph pump with dual cylinders and dual plungers'20067,063,785'Pump for liquid chromatography'20066,923,916'Liquid chromatograph pump and control method therefor'20056,725,837'Fuel supply system'20046,701,898'Fuel supply apparatus and method of control thereof'20046,651,630'High pressure fuel pump'20036,505,608'Fuel supply system'20036,047,684'Gear pump and fuel transfer system using the gear pump'20005,884,597'Fuel feeding apparatus for internal combustion engine and vehicle using the fuel feeding apparatus'19995,699,693'Widthwise compressing machine and method using vibrations to reduce material width'1997Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1997–2014Patents assigned to HITACHI LTD (12)· patent assignee history
1997–2019Based in Ibaraki, JP· patent location history
1999–2000Based in Niihari-gun, JP· patent location history
2003–2009Based in Chiyoda-ku, JP· patent location history
2005–2016Patents assigned to HITACHI HIGH TECH CORP (6)· patent assignee history
2010–2021Based in Kasumigaura, JP· patent location history
2013–2017Patents assigned to HIRAKU KENJI (7)· patent assignee history
2016–2021Patents assigned to HITACHI CONSTRUCTION MACH CO (21)· patent assignee history
2016–2021Based in Tsuchiura, JP· patent location history
2017–2021Patents assigned to HITACHI AUTOMOTIVE SYSTEMS LTD (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI CONSTRUCTION MACH CO | 21 | 2016–2021 |
| HITACHI LTD | 12 | 1997–2014 |
| HIRAKU KENJIself | 7 | 2013–2017 |
| HITACHI HIGH TECH CORP | 6 | 2005–2016 |
| HITACHI AUTOMOTIVE SYSTEMS LTD | 3 | 2017–2021 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kasumigaura, JP | 17 | 2010–2021 |
| Tsuchiura, JP | 12 | 2016–2021 |
| Chiyoda-ku, JP | 8 | 2003–2009 |
| Ibaraki, JP | 3 | 1997–2019 |
| Niihari-gun, JP | 2 | 1999–2000 |