Inventor
KANAO KEIJI
JP39 patents
⚠️ This page may combine multiple inventors who share the name “KANAO KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DENSO CORP
25 patentsUS6346766B1Feb 12, 2002
Spark plug for internal combustion engine and method for manufacturing same
DENSO CORP65 citations96
US6307307B1Oct 23, 2001
Spark plug for internal combustion engine with Ir alloy molten portion outside spark discharge region
DENSO CORP47 citations96
US6885135B2Apr 26, 2005
Spark plug and its manufacturing method
DENSO CORP46 citations92
US6853116B2Feb 8, 2005
Structure of spark plug designed to provide higher durability and ignitability of fuel
DENSO CORP39 citations92
US6844662B2Jan 18, 2005
Spark plug and ignition apparatus
DENSO CORP20 citations92
US6831397B2Dec 14, 2004
Spark plug and a method of producing the same
DENSO CORP24 citations92
US6724132B2Apr 20, 2004
Spark plug for an engine for a cogeneration system
DENSO CORP39 citations92
US6653767B2Nov 25, 2003
Spark plug and ignition apparatus
DENSO CORP24 citations92
US6523515B2Feb 25, 2003
Spark plug for internal combustion engines and manufacturing method thereof
DENSO CORP31 citations92
US6337533B1Jan 8, 2002
Spark plug for internal combustion engine and method for manufacturing same
DENSO CORP50 citations92
US6262522B1Jul 17, 2001
Spark plug for internal combustion engine
DENSO CORP45 citations91
US6621198B2Sep 16, 2003
Spark plug having iridum alloy tip, iron-based alloy tip bonding portion and stress relieving layer therebetween
DENSO CORP37 citations90
US7250711B2Jul 31, 2007
Spark plug with increased durability and carbon fouling resistance
DENSO CORP12 citations84
US6470845B2Oct 29, 2002
Spark plug for internal combustion engine
DENSO CORP19 citations84
US6373172B1Apr 16, 2002
Spark plug for internal combustion engine having a straight pillar ground electrode
DENSO CORP15 citations77
US7554253B2Jun 30, 2009
Spark plug with increased durability and carbon fouling resistance
DENSO CORP7 citations74
US6885137B2Apr 26, 2005
Spark plug and its manufacturing method
DENSO CORP8 citations73
US6700317B2Mar 2, 2004
Spark plug for an internal combustion engine and manufacturing method of the same
DENSO CORP9 citations66
US7298070B2Nov 20, 2007
Compact structure of spark plug designed to ensure desired heat range
DENSO CORP5 citations63
US7224109B2May 29, 2007
Spark plug
DENSO CORP4 citations63
US7176608B2Feb 13, 2007
Spark plug
DENSO CORP4 citations63
US6819033B2Nov 16, 2004
Spark plug and method of manufacturing same
DENSO CORP4 citations63
US6794804B2Sep 21, 2004
Production method of spark plug designed to provide high temperature oxidation resistance and weld strength and spark plug produced thereby
DENSO CORP5 citations63
US7484402B2Feb 3, 2009
Gas sensor
DENSO CORP0 citations42
US7230369B2Jun 12, 2007
Spark plug
DENSO CORP0 citations42
NIPPON DENSO CO
5 patentsUS6094000AJul 25, 2000
Spark plug for internal combustion engine
NIPPON DENSO CO85 citations95
US5990602ANov 23, 1999
Long life spark plug having minimum noble metal amount
NIPPON DENSO CO47 citations92
US5581145ADec 3, 1996
Spark plug
NIPPON DENSO CO27 citations92
US5557158ASep 17, 1996
Spark plug and method of producing the same
NIPPON DENSO CO34 citations92
US5693999ADec 2, 1997
Multiple gap spark plug for internal combustion engine
NIPPON DENSO CO16 citations73
NIPPON SOKEN
5 patentsUS7183702B2Feb 27, 2007
Spark plug with high insulation properties and high capability to ignite air-fuel mixture
NIPPON SOKEN10 citations84
US7086363B2Aug 8, 2006
Spark plug and ignition apparatus using same
NIPPON SOKEN7 citations74
US7282844B2Oct 16, 2007
High performance, long-life spark plug
NIPPON SOKEN6 citations63
US7267116B2Sep 11, 2007
Spark plug and ignition apparatus using same
NIPPON SOKEN5 citations63
US7122948B2Oct 17, 2006
Spark plug having enhanced capability to ignite air-fuel mixture
NIPPON SOKEN6 citations63
KANAO KEIJI
4 patentsUS8258686B2Sep 4, 2012
Spark plug for internal combustion engine
KANAO KEIJI2 citations57
US8523624B2Sep 3, 2013
Spark plug for internal combustion engine and manufacturing method thereof
KANAO KEIJI0 citations47
US9039879B2May 26, 2015
Gas sensor and method of manufacturing thereof
KANAO KEIJI0 citations40
US8449742B2May 28, 2013
Gas sensor and method of manufacturing same
KANAO KEIJI0 citations37