Inventor · disambiguated record
Tsukasa Toyooka
Also filed as: TOYOOKA TSUKASA
26 granted patents·4 pending applications·563 citations·filing 1994–2013
97Inventor score
Files withHITACHI CONSTRUCTION MACHINERY24UDAGAWA TSUTOMU2HITAHI CONSTRUCTION MACHINERY1KAMIYA SHOUHEI1MATSUSHITA MAKOTO1
Top patents by PatentIndex Score
30 records- 0193US7272928B2Hydraulic circuit of construction machineryHITACHI CONSTRUCTION MACHINERY·Filed 2006·Granted Sep 25, 2007·24 cites·4 claims
- 0289US7076947B2Hydraulic circuit of construction machineryHITACHI CONSTRUCTION MACHINERY·Filed 2002·Granted Jul 18, 2006·28 cites·6 claims
- 0386US5479778AHydraulic control system for construction machinesHITACHI CONSTRUCTION MACHINERY·Filed 1994·Granted Jan 2, 1996·33 cites·14 claims
- 0483US7127887B2Oil pressure circuit for working machinesHITACHI CONSTRUCTION MACHINERY·Filed 2004·Granted Oct 31, 2006·31 cites·6 claims
- 0581US6691510B2Pipe breakage control valve deviceHITACHI CONSTRUCTION MACHINERY·Filed 2001·Granted Feb 17, 2004·23 cites·3 claims
- 0674US7712565B2HST travel system for working machineHITACHI CONSTRUCTION MACHINERY·Filed 2006·Granted May 11, 2010·11 cites·5 claims
- 0773US5911506AControl system for prime mover and hydraulic pump of hydraulic construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1998·Granted Jun 15, 1999·37 cites·6 claims
- 0873US5848531AHydraulic drive system for construction machinesHITACHI CONSTRUCTION MACHINERY·Filed 1997·Granted Dec 15, 1998·36 cites·17 claims
- 0973US5829252AHydraulic system having tandem hydraulic functionHITACHI CONSTRUCTION MACHINERY·Filed 1996·Granted Nov 3, 1998·37 cites·23 claims
- 1072US5673558AHydraulic circuit system for hydraulic excavatorHITACHI CONSTRUCTION MACHINERY·Filed 1995·Granted Oct 7, 1997·38 cites·10 claims
- 1170US5940997AHydraulic circuit system for hydraulic working machineHITACHI CONSTRUCTION MACHINERY·Filed 1998·Granted Aug 24, 1999·33 cites·15 claims
- 1266US5974796AHydraulic circuit system for hydraulic working machineHITACHI CONSTRUCTION MACHINERY·Filed 1997·Granted Nov 2, 1999·29 cites·7 claims
- 1364US6220028B1Hydraulic drive system for hydraulic work vehicleHITACHI CONSTRUCTION MACHINERY·Filed 1998·Granted Apr 24, 2001·30 cites·7 claims
- 1464US5890303AHydraulic by-pass circuit for a hydraulic shovelHITACHI CONSTRUCTION MACHINERY·Filed 1996·Granted Apr 6, 1999·29 cites·5 claims
- 1563US6619037B1Hydraulic driving device of civil engineering and construction machineryHITACHI CONSTRUCTION MACHINERY·Filed 2000·Granted Sep 16, 2003·13 cites·3 claims
- 1663US5930996AAuto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pumpHITACHI CONSTRUCTION MACHINERY·Filed 1998·Granted Aug 3, 1999·28 cites·5 claims
- 1761US8585156B2Travel control device for work vehicle and work vehicleUDAGAWA TSUTOMU·Filed 2006·Granted Nov 19, 2013·5 cites·7 claims
- 1859US6212886B1Hydraulic drive system and directional control valve apparatus in hydraulic machineHITACHI CONSTRUCTION MACHINERY·Filed 1998·Granted Apr 10, 2001·14 cites·11 claims
- 1958US6241212B1Hose rupture control valve unitHITACHI CONSTRUCTION MACHINERY·Filed 1999·Granted Jun 5, 2001·16 cites·6 claims
- 2056US7487609B2Hydraulic circuit device of hydraulic working machineHITAHI CONSTRUCTION MACHINERY·Filed 2002·Granted Feb 10, 2009·11 cites·1 claims
- 2154US6161586ATournament oil path constituting apparatusHITACHI CONSTRUCTION MACHINERY·Filed 1999·Granted Dec 19, 2000·13 cites·6 claims
- 2252US7114591B2Steering system for working truckHITACHI CONSTRUCTION MACHINERY·Filed 2003·Granted Oct 3, 2006·4 cites·6 claims
- 2348US5907951AHydraulic control system for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1998·Granted Jun 1, 1999·16 cites·7 claims
- 2447US2014033699A1Travel control device for work vehicle and work vehicleHITACHI CONSTRUCTION MACHINERY·Filed 2013·Application pending·0 cites
- 2542US5813311AHydraulic control system for hydraulic working machineHITACHI CONSTRUCTION MACHINERY·Filed 1996·Granted Sep 29, 1998·12 cites·10 claims
- 2641US6101456AOutput correcting method in control system, control system, and hydraulic pump control systemHITACHI CONSTRUCTION MACHINERY·Filed 1996·Granted Aug 8, 2000·12 cites·18 claims
- 2741US2005008468A1Self-propelled working machineFiled 2003·Application pending·0 cites
- 2840US8146691B2Travel drive system for work vehicle, work vehicle, and travel drive methodUDAGAWA TSUTOMU·Filed 2007·Granted Apr 3, 2012·0 cites·16 claims
- 2936US2007170001A1Working machine and device cover used in the sameMATSUSHITA MAKOTO·Filed 2005·Application pending·0 cites
- 3032US2008314854A1Working MachineKAMIYA SHOUHEI·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →