Inventor · disambiguated record
Yoshihiro Matsubara
Also filed as: MATSUBARA YOSHIHIRO
60 granted patents·4 pending applications·1,029 citations·filing 1987–2016
99Inventor score
Files withNGK SPARK PLUG CO58PANASONIC IP MAN CO LTD2FUJITSU LTD1MATSUBARA YOSHIHIRO1SANYO ELECTRIC CO1
Top patents by PatentIndex Score
64 records- 0198US6229253B1Spark plug with specific gap between insulator and electrodesNGK SPARK PLUG CO·Filed 1999·Granted May 8, 2001·105 cites·14 claims
- 0296US4770129ASensor for mixing ratio of gasoline and alcoholNGK SPARK PLUG CO·Filed 1987·Granted Sep 13, 1988·49 cites·2 claims
- 0391US6628050B1Spark plugNGK SPARK PLUG CO·Filed 2000·Granted Sep 30, 2003·33 cites·11 claims
- 0489US7336024B2Spark plugNGK SPARK PLUG CO·Filed 2005·Granted Feb 26, 2008·11 cites·9 claims
- 0589US6923699B2Method of making a spark plugNGK SPARK PLUG CO·Filed 2003·Granted Aug 2, 2005·41 cites·18 claims
- 0687US6095124ASpark plug and an internal combustion engine igniting system using the sameNGK SPARK PLUG CO·Filed 1998·Granted Aug 1, 2000·44 cites·20 claims
- 0786US5929556ASpark plug with center electrode having variable diameter portion retracted from front end on insulatorNGK SPARK PLUG CO·Filed 1996·Granted Jul 27, 1999·42 cites·19 claims
- 0883US6536406B2Ignition system for internal combustion engineNGK SPARK PLUG CO·Filed 2001·Granted Mar 25, 2003·18 cites·19 claims
- 0981US6166480ASpark plugNGK SPARK PLUG CO·Filed 1998·Granted Dec 26, 2000·33 cites·27 claims
- 1081US6091185ALateral electrode type spark plug with geometrical relationships with ground electrodeNGK SPARK PLUG CO·Filed 1998·Granted Jul 18, 2000·33 cites·10 claims
- 1181US5831377ASpark plug in use for an internal combustion engineNGK SPARK PLUG CO·Filed 1997·Granted Nov 3, 1998·33 cites·18 claims
- 1280US6724133B2Spark plug with nickel alloy electrode base materialNGK SPARK PLUG CO·Filed 2001·Granted Apr 20, 2004·18 cites·32 claims
- 1379US6472801B1Spark plug with a corrosion impeding layerNGK SPARK PLUG CO·Filed 2000·Granted Oct 29, 2002·17 cites·20 claims
- 1479US5752488AMethod of controlling start of engine and device for carrying out the sameNGK SPARK PLUG CO·Filed 1996·Granted May 19, 1998·34 cites·14 claims
- 1578US5365910AMisfire detector for use in internal combustion engineNGK SPARK PLUG CO·Filed 1992·Granted Nov 22, 1994·21 cites·4 claims
- 1677US7279827B2Spark plug with electrode including precious metalNGK SPARK PLUG CO·Filed 2004·Granted Oct 9, 2007·14 cites·11 claims
- 1775US6225752B1Spark plug for internal combustion engineNGK SPARK PLUG CO·Filed 2000·Granted May 1, 2001·19 cites·8 claims
- 1874US7382084B2Spark plug having a precious metal tipNGK SPARK PLUG CO·Filed 2004·Granted Jun 3, 2008·13 cites·14 claims
- 1974US6819032B2Spark plug having resistance against smoldering, long lifetime, and excellent ignitabilityNGK SPARK PLUG CO·Filed 2000·Granted Nov 16, 2004·14 cites·27 claims
- 2073US5347855AMisfire detector device for use in an internal combustion engineNGK SPARK PLUG CO·Filed 1993·Granted Sep 20, 1994·18 cites·7 claims
- 2172US6464146B2Method of inputting information about a card, apparatus for processing information about a card, and computer productFUJITSU LTD·Filed 2001·Granted Oct 15, 2002·7 cites·9 claims
- 2270US5797383ADual polarity type ignition system for a spark plug groupNGK SPARK PLUG CO·Filed 1997·Granted Aug 25, 1998·20 cites·8 claims
- 2368US7288879B2Spark plug having ground electrode including precious metal alloy portion containing first, second and third componentsNGK SPARK PLUG CO·Filed 2004·Granted Oct 30, 2007·10 cites·12 claims
- 2468US6208066B1Semi-creeping discharge type spark plugNGK SPARK PLUG CO·Filed 1998·Granted Mar 27, 2001·22 cites·37 claims
- 2568US5793151ACreeping discharge spark plugNGK SPARK PLUG CO·Filed 1996·Granted Aug 11, 1998·23 cites·15 claims
- 2668US5269282AMisfire detector for use in internal combustion engineNGK SPARK PLUG CO·Filed 1992·Granted Dec 14, 1993·15 cites·10 claims
- 2766US7663296B2Spark plug for internal combustion engineNGK SPARK PLUG CO·Filed 2007·Granted Feb 16, 2010·4 cites·12 claims
- 2866US5873338ASpark plug for an internal combustion engineNGK SPARK PLUG CO·Filed 1997·Granted Feb 23, 1999·22 cites·9 claims
- 2966US5317267ASpark plug voltage probe for use with an internal combustion engineNGK SPARK PLUG CO·Filed 1992·Granted May 31, 1994·14 cites·1 claims
- 3064US6335587B1Spark plugNGK SPARK PLUG CO·Filed 1999·Granted Jan 1, 2002·17 cites·9 claims
- 3164US6281682B1Sensor for detecting ignition current and ion current in ignition secondary circuitNGK SPARK PLUG CO·Filed 1999·Granted Aug 28, 2001·16 cites·17 claims
- 3262USRE41944EMethod for manufacturing noble metal electric discharge chips for spark plugsNGK SPARK PLUG CO·Filed 2008·Granted Nov 23, 2010·2 cites·7 claims
- 3360US6215233B1Spark plugNGK SPARK PLUG CO·Filed 1999·Granted Apr 10, 2001·15 cites·6 claims
- 3458US5477148ASpark plug voltage probe device for use in an internal combustion engineNGK SPARK PLUG CO·Filed 1994·Granted Dec 19, 1995·9 cites·3 claims
- 3558US4984905ATemperature and pressure detecting type spark plugNGK SPARK PLUG CO·Filed 1990·Granted Jan 15, 1991·20 cites·8 claims
- 3656US6326720B1Spark plug and ignition system for use with internal combustion engineNGK SPARK PLUG CO·Filed 1999·Granted Dec 4, 2001·13 cites·18 claims
- 3755US7131191B2Method for manufacturing noble metal electric discharge chips for spark plugsNGK SPARK PLUG CO·Filed 2004·Granted Nov 7, 2006·10 cites·6 claims
- 3855US6617706B2Ignition systemNGK SPARK PLUG CO·Filed 1999·Granted Sep 9, 2003·13 cites·12 claims
- 3955US5347856AMisfire detector device for use in an internal combustion engineNGK SPARK PLUG CO·Filed 1993·Granted Sep 20, 1994·10 cites·6 claims
- 4054US4895444ADetector device for mixing ratio for gasoline and alcohol or the likeNGK SPARK PLUG CO·Filed 1988·Granted Jan 23, 1990·10 cites·7 claims
- 4153US2014073083A1Manufacturing method for solar cellSANYO ELECTRIC CO·Filed 2013·Application pending·0 cites
- 4251US7528534B2Spark plugNGK SPARK PLUG CO·Filed 2004·Granted May 5, 2009·4 cites·12 claims
- 4351US5294888ADevice for detecting misfire of an internal combustion engine by comparing voltage waveforms associated with ignition systemNGK SPARK PLUG CO·Filed 1992·Granted Mar 15, 1994·9 cites·2 claims
- 4450US5866972ASpark plug in use for an internal combustion engineNGK SPARK PLUG CO·Filed 1997·Granted Feb 2, 1999·10 cites·5 claims
- 4549US6564786B2Apparatus and method for controlling ignition of an internal combustion engineNGK SPARK PLUG CO·Filed 2001·Granted May 20, 2003·4 cites·10 claims
- 4649US5734094AIon current detector device for use in an internal combustion engineNGK SPARK PLUG CO·Filed 1997·Granted Mar 31, 1998·18 cites·6 claims
- 4748US4824244ASensor for mixing ratio of gasoline and alcohol or the likeNGK SPARK PLUG CO·Filed 1987·Granted Apr 25, 1989·7 cites·2 claims
- 4846US5253627ABurning condition detecting device and burning control device in an internal combustion engineNGK SPARK PLUG CO·Filed 1992·Granted Oct 19, 1993·7 cites·7 claims
- 4946US5024534ATemperature sensor for use in a spark plug of an internal combustion engineNGK SPARK PLUG CO·Filed 1989·Granted Jun 18, 1991·12 cites·2 claims
- 5045US2012044060A1Electronic Device And Data Management SystemMATSUBARA YOSHIHIRO·Filed 2011·Application pending·0 cites
Showing the top 50 of 64 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →