Inventor
ISHIGURO HIROYA
JP8 patents
⚠️ This page may combine multiple inventors who share the name “ISHIGURO HIROYA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DENSO CORP
6 patentsUS6676468B2Jan 13, 2004
Method of producing a spark plug
DENSO CORP40 citations91
US6642638B2Nov 4, 2003
Spark plug with Ir-alloy chip
DENSO CORP28 citations89
US8994257B2Mar 31, 2015
Spark plug for internal combustion engine and method for manufacturing same
DENSO CORP4 citations71
US7400081B2Jul 15, 2008
Compact spark plug with high gas tightness
DENSO CORP7 citations60
US10389091B2Aug 20, 2019
Spark plug for internal combustion engine and ignition system having spark plug
DENSO CORP0 citations39
US10148068B2Dec 4, 2018
Spark plug and semi-finished product thereof
DENSO CORP0 citations29