Inventor · disambiguated record
Toichi Hirata
Also filed as: HIRATA TOICHI
91 granted patents·3 pending applications·2,873 citations·filing 1985–2007
99Inventor score
Top patents by PatentIndex Score
94 records- 0197US6810362B2Construction machine managing method and system, and arithmetic processing deviceHITACHI CONSTRUCTION MACHINERY·Filed 2001·Granted Oct 26, 2004·90 cites·30 claims
- 0296US6450284B1Cab for construction machineryHITACHI CONSTRUCTION MACHINERY·Filed 2000·Granted Sep 17, 2002·91 cites·5 claims
- 0396US6020651AEngine control system for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1998·Granted Feb 1, 2000·107 cites·7 claims
- 0496US4967557AControl system for load-sensing hydraulic drive circuitHITACHI CONSTRUCTION MACHINERY·Filed 1989·Granted Nov 6, 1990·90 cites·12 claims
- 0595US5835874ARegion limiting excavation control system for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1995·Granted Nov 10, 1998·117 cites·34 claims
- 0694US5155996AHydraulic drive system for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1990·Granted Oct 20, 1992·61 cites·38 claims
- 0793US5177964AHydraulic drive traveling systemHITACHI CONSTRUCTION MACHINERY·Filed 1990·Granted Jan 12, 1993·64 cites·21 claims
- 0892US5758499AHydraulic control systemHITACHI CONSTRUCTION MACHINERY·Filed 1996·Granted Jun 2, 1998·51 cites·7 claims
- 0992US4875337AConstruction machine dual-dump hydraulic circuit with piloted arm-boom cylinder supply priority switching valvesHITACHI CONSTRUCTION MACHINERY·Filed 1987·Granted Oct 24, 1989·46 cites·7 claims
- 1091US5083430AHydraulic driving apparatusHITACHI CONSTRUCTION MACHINERY·Filed 1989·Granted Jan 28, 1992·43 cites·21 claims
- 1190USD437602SHydraulic excavatorHITACHI CONSTRUCTION MACHINERY·Filed 1999·Granted Feb 13, 2001·48 cites·1 claims
- 1290US5447027AHydraulic drive system for hydraulic working machinesHITACHI CONSTRUCTION MACHINERY·Filed 1994·Granted Sep 5, 1995·42 cites·12 claims
- 1390US5056312AHydraulic drive system for construction machinesHITACHI CONSTRUCTION MACHINERY·Filed 1989·Granted Oct 15, 1991·47 cites·15 claims
- 1490US4697418AControl system for hydraulically-operated construction machineryHITACHI CONSTRUCTION MACHINERY·Filed 1986·Granted Oct 6, 1987·53 cites·13 claims
- 1589US6907384B2Method and system for managing construction machine, and arithmetic processing apparatusHITACHI CONSTRUCTION MACHINERY·Filed 2001·Granted Jun 14, 2005·57 cites·19 claims
- 1689US5701691ARegion limiting excavation control system for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1995·Granted Dec 30, 1997·74 cites·21 claims
- 1789US5134853AHydraulic drive system for construction machinesHITACHI CONSTRUCTION MACHINERY·Filed 1989·Granted Aug 4, 1992·38 cites·10 claims
- 1888US5446979AHydraulic circuit system for civil engineering and construction machinesHITACHI CONSTRUCTION MACHINERY·Filed 1993·Granted Sep 5, 1995·39 cites·9 claims
- 1987US7020553B2Signal processing system for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 2003·Granted Mar 28, 2006·30 cites·9 claims
- 2087US5394697AHydraulic drive systemHITACHI CONSTRUCTION MACHINERY·Filed 1993·Granted Mar 7, 1995·37 cites·10 claims
- 2186US6449884B1Method and system for managing construction machine, and arithmetic processing apparatusHITACHI CONSTRUCTION MACHINERY·Filed 2001·Granted Sep 17, 2002·36 cites·17 claims
- 2286US5479778AHydraulic control system for construction machinesHITACHI CONSTRUCTION MACHINERY·Filed 1994·Granted Jan 2, 1996·33 cites·14 claims
- 2386US5442912AHydraulic recovery deviceHITACHI CONSTRUCTION MACHINERY·Filed 1993·Granted Aug 22, 1995·34 cites·17 claims
- 2486US4955344AApparatus for controlling rotational speed of prime mover of construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1989·Granted Sep 11, 1990·41 cites·33 claims
- 2584US6325450B2Operator's cab in construction machineHITACHI CONSTRUCTION MACHINERY·Filed 2001·Granted Dec 4, 2001·31 cites·5 claims
- 2684US5315826AHydraulic drive system and directional control valveHITACHI CONSTRUCTION MACHINERY·Filed 1991·Granted May 31, 1994·33 cites·12 claims
- 2784US5267440AHydraulic control system for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1991·Granted Dec 7, 1993·55 cites·14 claims
- 2883US6728619B2Failure measure outputting method, output system, and output deviceHITACHI CONSTRUCTION MACHINERY·Filed 2001·Granted Apr 27, 2004·74 cites·19 claims
- 2982US7493112B2Construction machine management apparatus and construction machines management systemHITACHI CONSTRUCTION MACHINERY·Filed 2007·Granted Feb 17, 2009·16 cites·4 claims
- 3082US5085051ADisplacement of variable displacement pump controlled by load sensing device having two settings for low and high speed operation of an actuatorHITACHI CONSTRUCTION MACHINERY·Filed 1989·Granted Feb 4, 1992·29 cites·5 claims
- 3182US5048296AAnti-vibration apparatus in a hydraulic system for boom cylinder of working apparatusHITACHI CONSTRUCTION CO LTD·Filed 1990·Granted Sep 17, 1991·56 cites·20 claims
- 3279US7171188B1Communication system for working machinesHITACHI CONSTRUCTION MACHINERY·Filed 2000·Granted Jan 30, 2007·27 cites·8 claims
- 3379US6832175B2Method for managing construction machine, and arithmetic processing apparatusHITACHI CONSTRUCTION MACHINERY·Filed 2001·Granted Dec 14, 2004·46 cites·8 claims
- 3479US5497805ADrive control system for hydraulic machineHITACHI CONSTRUCTION MACHINERY·Filed 1994·Granted Mar 12, 1996·31 cites·7 claims
- 3578US5433076AHydraulic control valve apparatus and hydraulic drive systemHITACHI CONSTRUCTION MACHINERY·Filed 1993·Granted Jul 18, 1995·27 cites·39 claims
- 3677US7050893B2Method of detection of actual operating time of machinery deployed at construction sites, data collection and management system, and base stationHITACHI CONSTRUCTION MACHINERY·Filed 2001·Granted May 23, 2006·23 cites·26 claims
- 3777US5960378AExcavation area setting system for area limiting excavation control in construction machinesHITACHI CONSTRUCTION MACHINERY·Filed 1997·Granted Sep 28, 1999·44 cites·6 claims
- 3877US5152143AHydraulic drive systemHITACHI CONSTRUCTION MACHINERY·Filed 1989·Granted Oct 6, 1992·28 cites·18 claims
- 3977US4753158APilot hydraulic system for operating directional control valveHITACHI CONSTRUCTION MACHINERY·Filed 1986·Granted Jun 28, 1988·22 cites·9 claims
- 4074US7370475B2Traveling hydraulic working machineHITACHI CONSTRUCTION MACHINERY·Filed 2004·Granted May 13, 2008·13 cites·13 claims
- 4174US5186000AHydraulic drive system for construction machinesHITACHI CONSTRUCTION MACHINERY·Filed 1992·Granted Feb 16, 1993·38 cites·3 claims
- 4273US5911506AControl system for prime mover and hydraulic pump of hydraulic construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1998·Granted Jun 15, 1999·37 cites·6 claims
- 4373US5848531AHydraulic drive system for construction machinesHITACHI CONSTRUCTION MACHINERY·Filed 1997·Granted Dec 15, 1998·36 cites·17 claims
- 4473US5829252AHydraulic system having tandem hydraulic functionHITACHI CONSTRUCTION MACHINERY·Filed 1996·Granted Nov 3, 1998·37 cites·23 claims
- 4573US5079919AHydraulic drive system for crawler mounted vehicleHITACHI CONSTRUCTION MACHINERY·Filed 1990·Granted Jan 14, 1992·36 cites·10 claims
- 4672US7228125B2Construction machine management apparatus and construction machines management systemHITACHI CONSTRUCTION MACHINERY·Filed 2002·Granted Jun 5, 2007·23 cites·5 claims
- 4772US5673558AHydraulic circuit system for hydraulic excavatorHITACHI CONSTRUCTION MACHINERY·Filed 1995·Granted Oct 7, 1997·38 cites·10 claims
- 4872US5005358AHydraulic drive system for crawler-mounted construction vehicleHITACHI CONSTRUCTION MACHINERY·Filed 1989·Granted Apr 9, 1991·20 cites·5 claims
- 4971US7002465B2Security system of construction machineHITACHI CONSTRUCTION MACHINERY·Filed 2002·Granted Feb 21, 2006·20 cites·32 claims
- 5071US5421155AHydraulic drive system for hydraulic working machinesHITACHI CONSTRUCTION MACHINERY·Filed 1993·Granted Jun 6, 1995·34 cites·15 claims
Showing the top 50 of 94 patent records by PatentIndex Score.
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