Inventor · disambiguated record
Yukio Aoyagi
Also filed as: AOYAGI YUKIO
21 granted patents·963 citations·filing 1980–1994
97Inventor score
Files withHITACHI CONSTRUCTION MACHINERY21
Top patents by PatentIndex Score
21 records- 0198US4606313AMethod of and system for controlling hydraulic power systemHITACHI CONSTRUCTION MACHINERY·Filed 1981·Granted Aug 19, 1986·107 cites·31 claims
- 0297US4586330AControl system for hydraulic circuit apparatusHITACHI CONSTRUCTION MACHINERY·Filed 1982·Granted May 6, 1986·72 cites·6 claims
- 0396US4510750ACircuit pressure control system for hydrostatic power transmissionHITACHI CONSTRUCTION MACHINERY·Filed 1981·Granted Apr 16, 1985·68 cites·5 claims
- 0495US5048293APump controlling apparatus for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1989·Granted Sep 17, 1991·81 cites·17 claims
- 0595US4627013ALoad weight indicating system for load moving machineHITACHI CONSTRUCTION MACHINERY·Filed 1983·Granted Dec 2, 1986·80 cites·14 claims
- 0693US4768339AHydraulic drive systemHITACHI CONSTRUCTION MACHINERY·Filed 1987·Granted Sep 6, 1988·72 cites·18 claims
- 0793US4561249AControl system for hydraulic circuit apparatusHITACHI CONSTRUCTION MACHINERY·Filed 1982·Granted Dec 31, 1985·52 cites·2 claims
- 0891US4561250AHydraulic drive system having a plurality of prime moversHITACHI CONSTRUCTION MACHINERY·Filed 1982·Granted Dec 31, 1985·46 cites·10 claims
- 0990US5056312AHydraulic drive system for construction machinesHITACHI CONSTRUCTION MACHINERY·Filed 1989·Granted Oct 15, 1991·47 cites·15 claims
- 1089US4395199AControl method of a system of internal combustion engine and hydraulic pumpHITACHI CONSTRUCTION MACHINERY·Filed 1980·Granted Jul 26, 1983·51 cites·12 claims
- 1180US4531369AFlushing valve system in closed circuit hydrostatic power transmissionHITACHI CONSTRUCTION MACHINERY·Filed 1982·Granted Jul 30, 1985·30 cites·6 claims
- 1278US5295795AHydraulic drive system for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1992·Granted Mar 22, 1994·42 cites·5 claims
- 1378US4571941AHydraulic power systemHITACHI CONSTRUCTION MACHINERY·Filed 1981·Granted Feb 25, 1986·29 cites·18 claims
- 1478US4528813AControl system for hydrostatic power transmissionHITACHI CONSTRUCTION MACHINERY·Filed 1981·Granted Jul 16, 1985·29 cites·9 claims
- 1572US5277027AHydraulic drive system with pressure compensting valveHITACHI CONSTRUCTION MACHINERY·Filed 1992·Granted Jan 11, 1994·35 cites·10 claims
- 1670US5488787AHydraulic drive system for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1994·Granted Feb 6, 1996·36 cites·20 claims
- 1770US4587808AControl system for hydraulic circuit meansHITACHI CONSTRUCTION MACHINERY·Filed 1982·Granted May 13, 1986·25 cites·9 claims
- 1863US4464898AHydraulic power systemHITACHI CONSTRUCTION MACHINERY·Filed 1981·Granted Aug 14, 1984·19 cites·5 claims
- 1956US4520626AHydraulic drive system for single rod cylinderHITACHI CONSTRUCTION MACHINERY·Filed 1982·Granted Jun 4, 1985·18 cites·3 claims
- 2050US5174114AHydraulic drive system for construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1991·Granted Dec 29, 1992·16 cites·12 claims
- 2144US4451893AControl method and control system for hydrostatic drive systemHITACHI CONSTRUCTION MACHINERY·Filed 1981·Granted May 29, 1984·8 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →