Assignee
NGK SPARK PLUG CO
JP·2,220 granted patents·229 pending applications·29,542 citations·filing 1974–2023
Top patents by PatentIndex Score
2,449 records- 0199US6617769B2Spark plug and mounting structure of the sameNGK SPARK PLUG CO·Filed 2001·Granted Sep 9, 2003·84 cites·17 claims
- 0298US10714908B1Spark plugNGK SPARK PLUG CO·Filed 2020·Granted Jul 14, 2020·8 cites·4 claims
- 0398US10714906B1Spark plugNGK SPARK PLUG CO·Filed 2020·Granted Jul 14, 2020·9 cites·8 claims
- 0498US6533628B1Method of manufacturing spark plug and spark plugNGK SPARK PLUG CO·Filed 2000·Granted Mar 18, 2003·62 cites·10 claims
- 0598US6229253B1Spark plug with specific gap between insulator and electrodesNGK SPARK PLUG CO·Filed 1999·Granted May 8, 2001·105 cites·14 claims
- 0697US10770868B1Spark plug that suppresses pre-ignition and misfiresNGK SPARK PLUG CO·Filed 2020·Granted Sep 8, 2020·8 cites·6 claims
- 0797US10090646B2Spark plugNGK SPARK PLUG CO·Filed 2015·Granted Oct 2, 2018·15 cites·6 claims
- 0897US7321187B2Spark plug and method for manufacturing the spark plugNGK SPARK PLUG CO·Filed 2006·Granted Jan 22, 2008·30 cites·9 claims
- 0997US7002075B2Intermediate substrateNGK SPARK PLUG CO·Filed 2005·Granted Feb 21, 2006·72 cites·23 claims
- 1097US6512375B1Method of detecting spark plug fouling and ignition system having means for carrying out the sameNGK SPARK PLUG CO·Filed 2000·Granted Jan 28, 2003·49 cites·13 claims
- 1197US6304022B1Spark plugNGK SPARK PLUG CO·Filed 1999·Granted Oct 16, 2001·90 cites·24 claims
- 1296US11715933B2Spark plugNGK SPARK PLUG CO·Filed 2020·Granted Aug 1, 2023·5 cites·6 claims
- 1396US11456578B2Spark plugNGK SPARK PLUG CO·Filed 2020·Granted Sep 27, 2022·6 cites·4 claims
- 1496US11431155B2Spark plugNGK SPARK PLUG CO·Filed 2020·Granted Aug 30, 2022·6 cites·3 claims
- 1596US10944244B2Spark plugNGK SPARK PLUG CO·Filed 2020·Granted Mar 9, 2021·6 cites·5 claims
- 1696US10790639B1Spark plugNGK SPARK PLUG CO·Filed 2020·Granted Sep 29, 2020·5 cites·6 claims
- 1796US10033163B1Spark plugNGK SPARK PLUG CO·Filed 2018·Granted Jul 24, 2018·8 cites·7 claims
- 1896US7808799B2Wiring boardNGK SPARK PLUG CO·Filed 2007·Granted Oct 5, 2010·73 cites·23 claims
- 1996US7340942B2Sensor including a sensor element having electrode terminals spaced apart from a connecting end thereofNGK SPARK PLUG CO·Filed 2006·Granted Mar 11, 2008·33 cites·5 claims
- 2096US7305954B2Plasma-jet spark plug and ignition systemNGK SPARK PLUG CO·Filed 2007·Granted Dec 11, 2007·31 cites·4 claims
- 2196US6979801B2Glow plug with built-in combustion pressure sensor and manufacturing method thereofNGK SPARK PLUG CO·Filed 2004·Granted Dec 27, 2005·41 cites·10 claims
- 2296US6952049B1Capacitor-built-in type printed wiring substrate, printed wiring substrate, and capacitorNGK SPARK PLUG CO·Filed 2000·Granted Oct 4, 2005·224 cites·16 claims
- 2396US6512182B2Wiring circuit board and method for producing sameNGK SPARK PLUG CO·Filed 2002·Granted Jan 28, 2003·136 cites·23 claims
- 2496US6323439B1Metal core multilayer resin wiring board with thin portion and method for manufacturing the sameNGK SPARK PLUG CO·Filed 1999·Granted Nov 27, 2001·153 cites·17 claims
- 2596US6160342AResistor-incorporated spark plug and manufacturing method of resistor-incorporated spark plugNGK SPARK PLUG CO·Filed 1998·Granted Dec 12, 2000·72 cites·25 claims
- 2696US5279886AAlumina sintered bodyNGK SPARK PLUG CO·Filed 1991·Granted Jan 18, 1994·414 cites·8 claims
- 2796US4770129ASensor for mixing ratio of gasoline and alcoholNGK SPARK PLUG CO·Filed 1987·Granted Sep 13, 1988·49 cites·2 claims
- 2895US11050221B2Spark plug with anti-loosening featureNGK SPARK PLUG CO·Filed 2020·Granted Jun 29, 2021·4 cites·5 claims
- 2995US10367335B2Spark plug and production method thereforNGK SPARK PLUG CO·Filed 2017·Granted Jul 30, 2019·20 cites·7 claims
- 3095US10205305B2Spark plugNGK SPARK PLUG CO·Filed 2016·Granted Feb 12, 2019·13 cites·5 claims
- 3195US7328677B2Plasma-jet spark plug and ignition systemNGK SPARK PLUG CO·Filed 2007·Granted Feb 12, 2008·36 cites·5 claims
- 3295US7239014B2Capacitor-built-in type printed wiring substrate, printed wiring substrate, and capacitorNGK SPARK PLUG CO·Filed 2005·Granted Jul 3, 2007·51 cites·8 claims
- 3395US7084558B2Spark plug and method for manufacturing the spark plugNGK SPARK PLUG CO·Filed 2003·Granted Aug 1, 2006·46 cites·9 claims
- 3495US6505605B2Control system for an internal combustion engine and method carried out by the sameNGK SPARK PLUG CO·Filed 2001·Granted Jan 14, 2003·37 cites·31 claims
- 3595US5565157AMethod of making a spark plug insulatorNGK SPARK PLUG CO·Filed 1995·Granted Oct 15, 1996·66 cites·2 claims
- 3695US4670684ASpark plugNGK SPARK PLUG CO·Filed 1984·Granted Jun 2, 1987·79 cites·3 claims
- 3795US4505807AOxygen sensorNGK SPARK PLUG CO·Filed 1982·Granted Mar 19, 1985·94 cites·16 claims
- 3894US9896989B2Deterioration diagnosis device for oxidation catalystNGK SPARK PLUG CO·Filed 2016·Granted Feb 20, 2018·11 cites·2 claims
- 3994US9853423B1Spark plugNGK SPARK PLUG CO·Filed 2017·Granted Dec 26, 2017·11 cites·5 claims
- 4094US7889509B2Ceramic capacitorNGK SPARK PLUG CO·Filed 2006·Granted Feb 15, 2011·31 cites·10 claims
- 4194US7876030B2Ultrasonic transducer which is either crimped or welded during assemblyNGK SPARK PLUG CO·Filed 2008·Granted Jan 25, 2011·365 cites·14 claims
- 4294US7696442B2Wiring board and manufacturing method of wiring boardNGK SPARK PLUG CO·Filed 2006·Granted Apr 13, 2010·40 cites·8 claims
- 4394US7525814B2Wiring board and method for manufacturing the sameNGK SPARK PLUG CO·Filed 2006·Granted Apr 28, 2009·38 cites·16 claims
- 4494US7345246B2Wiring board and capacitor to be built into wiring boardNGK SPARK PLUG CO·Filed 2006·Granted Mar 18, 2008·34 cites·20 claims
- 4594US6743352B2Method and apparatus for correcting a gas sensor response for moisture in exhaust gasNGK SPARK PLUG CO·Filed 2002·Granted Jun 1, 2004·48 cites·8 claims
- 4694US6577490B2Wiring boardNGK SPARK PLUG CO·Filed 2002·Granted Jun 10, 2003·81 cites·16 claims
- 4794US6559579B2Alumina-based sintered body insulator for spark plugsNGK SPARK PLUG CO·Filed 2000·Granted May 6, 2003·40 cites·6 claims
- 4894US6526822B1Flow rate and flow velocity measurement deviceNGK SPARK PLUG CO·Filed 2000·Granted Mar 4, 2003·71 cites·25 claims
- 4994US6375828B2Methods and apparatus for measuring NOx gas concentration, for detecting exhaust gas concentration and for calibrating and controlling gas sensorNGK SPARK PLUG CO·Filed 1998·Granted Apr 23, 2002·82 cites·20 claims
- 5094US6189522B1Waste-spark engine ignitionNGK SPARK PLUG CO·Filed 1999·Granted Feb 20, 2001·79 cites·4 claims
Showing the top 50 of 2,449 patent records by PatentIndex Score.
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