Inventor · disambiguated record
Keiji Hisahara
Also filed as: HISAHARA KEIJI
3 granted patents·33 citations·filing 1994–2006
70Inventor score
Top patents by PatentIndex Score
3 records- 0174US7409937B2Hydraulic control system for internal combustion engineHITACHI LTD·Filed 2006·Granted Aug 12, 2008·8 cites·10 claims
- 0261US6802289B2Valve timing control system for internal combustion engineHITACHI UNISIA AUTOMOTIVE LTD·Filed 2003·Granted Oct 12, 2004·10 cites·21 claims
- 0346US5383770ARadial piston pump with vent in hollow pistonUNISIA JECS CORP·Filed 1994·Granted Jan 24, 1995·15 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →