Inventor · disambiguated record
Tsutomu Udagawa
Also filed as: UDAGAWA TSUTOMU
17 granted patents·1 pending application·143 citations·filing 1999–2020
92Inventor score
Top patents by PatentIndex Score
18 records- 0190US6339929B1Swivel control apparatusHITACHI CONSTRUCTION MACHINERY·Filed 2000·Granted Jan 22, 2002·46 cites·8 claims
- 0289US10400797B2Hydraulic control system for working machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Sep 3, 2019·5 cites·3 claims
- 0385US9695841B2Hydraulic closed circuit systemHITACHI CONSTRUCTION MACH CO·Filed 2013·Granted Jul 4, 2017·6 cites·13 claims
- 0480US10330128B2Hydraulic control system for work machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Jun 25, 2019·4 cites·5 claims
- 0578US7500360B2Hydraulic driving system of construction machineryHITACHI CONSTRUCTION MACHINERY·Filed 2003·Granted Mar 10, 2009·20 cites·26 claims
- 0675US8818649B2Rotation control device for working machineUDAGAWA TSUTOMU·Filed 2010·Granted Aug 26, 2014·7 cites·7 claims
- 0774US7712565B2HST travel system for working machineHITACHI CONSTRUCTION MACHINERY·Filed 2006·Granted May 11, 2010·11 cites·5 claims
- 0873US7175155B2Control valve apparatus and pressure circuitHITACHI CONSTRUCTION MACHINERY·Filed 2005·Granted Feb 13, 2007·7 cites·9 claims
- 0966US6644629B1Overwinding prevention device for winchHITACHI CONSTRUCTION MACHINERY·Filed 1999·Granted Nov 11, 2003·30 cites·12 claims
- 1061US10060450B2Hydraulic control device for work machineHITACHI CONSTRUCTION MACH CO·Filed 2013·Granted Aug 28, 2018·1 cites·7 claims
- 1161US8585156B2Travel control device for work vehicle and work vehicleUDAGAWA TSUTOMU·Filed 2006·Granted Nov 19, 2013·5 cites·7 claims
- 1249US9103093B2Rotation control device of working machineUDAGAWA TSUTOMU·Filed 2012·Granted Aug 11, 2015·1 cites·1 claims
- 1347US2014033699A1Travel control device for work vehicle and work vehicleHITACHI CONSTRUCTION MACHINERY·Filed 2013·Application pending·0 cites
- 1446US12077944B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2020·Granted Sep 3, 2024·0 cites·6 claims
- 1544US12152374B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2019·Granted Nov 26, 2024·0 cites·7 claims
- 1642US9212469B2Work machineHITACHI CONSTRUCTION MACHINERY·Filed 2012·Granted Dec 15, 2015·0 cites·3 claims
- 1740US8146691B2Travel drive system for work vehicle, work vehicle, and travel drive methodUDAGAWA TSUTOMU·Filed 2007·Granted Apr 3, 2012·0 cites·16 claims
- 1838US11274418B2Hydraulic work machineHITACHI CONSTRUCTION MACH CO·Filed 2018·Granted Mar 15, 2022·0 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →