Inventor · disambiguated record
Sotaro Tanaka
Also filed as: TANAKA SOTARO
7 granted patents·219 citations·filing 1981–2001
88Inventor score
Files withHITACHI CONSTRUCTION MACHINERY7
Top patents by PatentIndex Score
7 records- 0191US4561250AHydraulic drive system having a plurality of prime moversHITACHI CONSTRUCTION MACHINERY·Filed 1982·Granted Dec 31, 1985·46 cites·10 claims
- 0282US5839397AEngine cooling system and construction machineHITACHI CONSTRUCTION MACHINERY·Filed 1996·Granted Nov 24, 1998·74 cites·9 claims
- 0378US4571941AHydraulic power systemHITACHI CONSTRUCTION MACHINERY·Filed 1981·Granted Feb 25, 1986·29 cites·18 claims
- 0470US6244048B1Hydraulique drive deviceHITACHI CONSTRUCTION MACHINERY·Filed 1997·Granted Jun 12, 2001·37 cites·6 claims
- 0559US6502499B2Hydraulic recovery system for construction machine and construction machine using the sameHITACHI CONSTRUCTION MACHINERY·Filed 2001·Granted Jan 7, 2003·15 cites·20 claims
- 0645US4534268AHydraulic fluid circuit of hydraulic shovelHITACHI CONSTRUCTION MACHINERY·Filed 1982·Granted Aug 13, 1985·10 cites·3 claims
- 0745US4504185AHydraulic circuit of hydraulic power shovelHITACHI CONSTRUCTION MACHINERY·Filed 1982·Granted Mar 12, 1985·8 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →