Inventor
KUMAGAI KENICHI
JP8 patents
⚠️ This page may combine multiple inventors who share the name “KUMAGAI KENICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NGK SPARK PLUG CO
5 patentsUS6603244B2Aug 5, 2003
Spark plug and method of producing spark plug
NGK SPARK PLUG CO24 citations91
US6759795B2Jul 6, 2004
Spark plug
NGK SPARK PLUG CO9 citations72
US7804232B2Sep 28, 2010
Spark plug with high durability
NGK SPARK PLUG CO6 citations62
US7825571B2Nov 2, 2010
Spark plug for internal combustion engine
NGK SPARK PLUG CO2 citations61
US7741763B2Jun 22, 2010
Spark plug
NGK SPARK PLUG CO0 citations40