Inventor
OSAMURA HIRONORI
JP14 patents
⚠️ This page may combine multiple inventors who share the name “OSAMURA HIRONORI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DENSO CORP
12 patentsUS5977695ANov 2, 1999
Spark plug having improved consumption resistance
DENSO CORP63 citations96
US6215235B1Apr 10, 2001
Spark plug having a noble metallic firing tip bonded to an electric discharge electrode and preferably installed in internal combustion engine
DENSO CORP78 citations95
US6147441ANov 14, 2000
Spark plug
DENSO CORP58 citations95
US6093071AJul 25, 2000
Spark plug and process of producing same
DENSO CORP38 citations92
US5811915ASep 22, 1998
Spark plug including electrode with protruding portion for holding noble metallic chip, and method of making the same
DENSO CORP45 citations92
US6552476B1Apr 22, 2003
Spark plug for internal combustion engine having better self-cleaning function
DENSO CORP26 citations91
US6262522B1Jul 17, 2001
Spark plug for internal combustion engine
DENSO CORP45 citations91
US6316868B1Nov 13, 2001
Spark plug for internal combustion engine having better self-cleaning function
DENSO CORP32 citations87
US6794803B2Sep 21, 2004
Spark plug for an internal combustion engine
DENSO CORP18 citations81
US6891318B2May 10, 2005
Structure of spark plug designed to provide higher durability and fabrication method thereof
DENSO CORP8 citations73
US9385510B2Jul 5, 2016
Spark plug for internal combustion engine and method of manufacturing spark plug
DENSO CORP3 citations71
US9793687B2Oct 17, 2017
Spark plug for internal combustion engine, having an annular ground electrode facing an outer circumference of a center electrode
DENSO CORP0 citations40