Inventor · disambiguated record
Kenichi Kumagai
Also filed as: KUMAGAI KENICHI
8 granted patents·2 pending applications·46 citations·filing 1988–2025
83Inventor score
Top patents by PatentIndex Score
10 records- 0186US7804232B2Spark plug with high durabilityNGK SPARK PLUG CO·Filed 2005·Granted Sep 28, 2010·6 cites·9 claims
- 0286US6603244B2Spark plug and method of producing spark plugNGK SPARK PLUG CO·Filed 2002·Granted Aug 5, 2003·24 cites·16 claims
- 0366US2025313221A1Method for producing state recognition device and state recognition deviceYAMAHA MOTOR CO LTD·Filed 2025·Application pending·0 cites
- 0464US6759795B2Spark plugNGK SPARK PLUG CO·Filed 2003·Granted Jul 6, 2004·9 cites·18 claims
- 0559US7825571B2Spark plug for internal combustion engineNGK SPARK PLUG CO·Filed 2006·Granted Nov 2, 2010·2 cites·9 claims
- 0651US12258890B2Catalyst deterioration diagnosis deviceYAMAHA MOTOR CO LTD·Filed 2023·Granted Mar 25, 2025·0 cites·6 claims
- 0742US8288928B2Spark plug for internal combustion engineKUMAGAI KENICHI·Filed 2010·Granted Oct 16, 2012·0 cites·9 claims
- 0837US2004080252A1Spark plug for use in internal combustion engineNGK SPARK PLUG CO·Filed 2003·Application pending·0 cites
- 0934US7741763B2Spark plugNGK SPARK PLUG CO·Filed 2007·Granted Jun 22, 2010·0 cites·11 claims
- 1033US4911883ACold working stainless steelAICHI STEEL WORK LTD·Filed 1988·Granted Mar 27, 1990·5 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →