Inventor · disambiguated record
Takafumi Oshima
Also filed as: OSHIMA TAKAFUMI
67 granted patents·5 pending applications·1,838 citations·filing 1984–2021
99Inventor score
Files withNGK SPARK PLUG CO61NHK SPRING CO LTD7KONDO TOMONORI1NEW TOKYO INTERNAT AIRPORT AUT1TOTO LTD1
Top patents by PatentIndex Score
72 records- 0195US4670684ASpark plugNGK SPARK PLUG CO·Filed 1984·Granted Jun 2, 1987·79 cites·3 claims
- 0294US6743352B2Method 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
- 0394US6526822B1Flow rate and flow velocity measurement deviceNGK SPARK PLUG CO·Filed 2000·Granted Mar 4, 2003·71 cites·25 claims
- 0494US6375828B2Methods 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
- 0594US4700103ASpark plug and its electrode configurationNGK SPARK PLUG CO·Filed 1985·Granted Oct 13, 1987·99 cites·8 claims
- 0691US6923902B2Methods and apparatus for measuring NOx gas concentration, for detecting exhaust gas concentration and for calibrating and controlling gas sensorNGK SPARK PLUG CO·Filed 2002·Granted Aug 2, 2005·40 cites·12 claims
- 0790US5017826ARapid heat-dissipating type spark plug for internal combustion enginesNGK SPARK PLUG CO·Filed 1989·Granted May 21, 1991·100 cites·7 claims
- 0888US6308572B1Gas concentration sensorNGK SPARK PLUG CO·Filed 2000·Granted Oct 30, 2001·40 cites·45 claims
- 0987US6812821B2Humidity sensorNGK SPARK PLUG CO·Filed 2002·Granted Nov 2, 2004·29 cites·25 claims
- 1087US6533911B1Device for measuring combustible-gas concentration in an exhaust gasNGK SPARK PLUG CO·Filed 2000·Granted Mar 18, 2003·32 cites·17 claims
- 1186US6695964B1Method and apparatus for measuring NOx gas concentrationNGK SPARK PLUG CO·Filed 2000·Granted Feb 24, 2004·33 cites·40 claims
- 1285US6418782B1Gas concentration sensorNGK SPARK PLUG CO·Filed 2000·Granted Jul 16, 2002·27 cites·3 claims
- 1385US6071393ANitrogen oxide concentration sensorNGK SPARK PLUG CO·Filed 1997·Granted Jun 6, 2000·75 cites·12 claims
- 1482US6568281B1Ultrasonic-wave propagation-time measuring method, gas-pressure measuring method, gas-flow rate measuring method, and gas sensorNGK SPARK PLUG CO·Filed 2000·Granted May 27, 2003·22 cites·6 claims
- 1582US6337009B1Gas sensorNGK SPARK PLUG CO·Filed 2000·Granted Jan 8, 2002·21 cites·17 claims
- 1682US6136170AExhaust gas sensor and system thereofNGK SPARK PLUG CO·Filed 1997·Granted Oct 24, 2000·69 cites·54 claims
- 1782US5347193ASpark plug having an erosion resistant tipNGK SPARK PLUG CO·Filed 1992·Granted Sep 13, 1994·61 cites·4 claims
- 1881US6652723B1Hydrogen gas sensorNGK SPARK PLUG CO·Filed 2000·Granted Nov 25, 2003·17 cites·20 claims
- 1981US6647776B2Split-flow flowmeter with a profusion facing the detection elementNGK SPARK PLUG CO·Filed 2002·Granted Nov 18, 2003·26 cites·12 claims
- 2081US6084354AVehicle-lamp lighting-on deviceNGK SPARK PLUG CO·Filed 1998·Granted Jul 4, 2000·38 cites·10 claims
- 2178US6578414B2Split-flow-type flowmeterNGK SPARK PLUG CO·Filed 2001·Granted Jun 17, 2003·24 cites·18 claims
- 2278US5578895ASpark plug having a noble metal electrode tipNGK SPARK PLUG CO·Filed 1996·Granted Nov 26, 1996·29 cites·5 claims
- 2378US5461275ASpark plug for use in an internal combustion engineNGK SPARK PLUG CO·Filed 1994·Granted Oct 24, 1995·44 cites·1 claims
- 2478US5440198ASpark plug having a noble metal firing tip bonded to a front end of a center electrodeNGK SPARK PLUG CO·Filed 1993·Granted Aug 8, 1995·49 cites·4 claims
- 2578US5273474AMethod of manufacturing a center electrode for a spark plugNGK SPARK PLUG CO·Filed 1992·Granted Dec 28, 1993·49 cites·11 claims
- 2677US6474177B2Flow measurement device for measuring flow rate and flow velocityNGK SPARK PLUG CO·Filed 2001·Granted Nov 5, 2002·23 cites·18 claims
- 2776US6554984B2Method of manufacturing a gas sensorNGK SPARK PLUG CO·Filed 2001·Granted Apr 29, 2003·12 cites·3 claims
- 2876US6337006B1Lanthanum gallate sintered bodyNGK SPARK PLUG CO·Filed 2000·Granted Jan 8, 2002·12 cites·18 claims
- 2976US4967116ASpark plug having heat- and corrosion-resistant surfaceNGK SPARK PLUG CO·Filed 1988·Granted Oct 30, 1990·31 cites·7 claims
- 3076US4949006ASpark plug structureNGK SPARK PLUG CO·Filed 1989·Granted Aug 14, 1990·30 cites·7 claims
- 3175US6627964B2Gas sensorNGK SPARK PLUG CO·Filed 2001·Granted Sep 30, 2003·14 cites·8 claims
- 3273US6805003B2Mass flow sensor and mass flowmeter comprising the sameNGK SPARK PLUG CO·Filed 2001·Granted Oct 19, 2004·21 cites·11 claims
- 3372US6770508B2Electrode for silicon carbide semiconductor, silicon carbide semiconductor element comprising the electrode, and production method thereforNGK SPARK PLUG CO·Filed 2003·Granted Aug 3, 2004·16 cites·6 claims
- 3472US5578894ASpark plug for use in internal combustion engineNGK SPARK PLUG CO·Filed 1995·Granted Nov 26, 1996·25 cites·2 claims
- 3572US5101135ASpark plug for use in an internal combustion engineNGK SPARK PLUG CO·Filed 1990·Granted Mar 31, 1992·37 cites·6 claims
- 3671US6344134B1Method for measuring NOx concentration and NOx concentration sensorNGK SPARK PLUG CO·Filed 1999·Granted Feb 5, 2002·37 cites·35 claims
- 3769US6568240B1Method and apparatus using a gas concentration sensor for accurately controlling an air fuel ratio in an internal combustion engineNGK SPARK PLUG CO·Filed 2000·Granted May 27, 2003·15 cites·15 claims
- 3869US6214208B1Method and apparatus for measuring NOx gas concentrationNGK SPARK PLUG CO·Filed 1997·Granted Apr 10, 2001·36 cites·25 claims
- 3968US6224727B1NOx sensorNGK SPARK PLUG CO·Filed 1998·Granted May 1, 2001·32 cites·3 claims
- 4067US6886412B2Ultrasonic-wave propagation-time measuring method and gas concentration sensorNGK SPARK PLUG CO·Filed 2002·Granted May 3, 2005·7 cites·9 claims
- 4167US5210457AOuter electrode for spark plug and a method of manufacturing thereofNGK SPARK PLUG CO·Filed 1991·Granted May 11, 1993·30 cites·7 claims
- 4266US7306712B2Gas sensor and method for measuring gas concentration using the sameNGK SPARK PLUG CO·Filed 2002·Granted Dec 11, 2007·6 cites·9 claims
- 4365US5320569AMethod of making a spark plugNGK SPARK PLUG CO·Filed 1993·Granted Jun 14, 1994·28 cites·6 claims
- 4464US5959521AHigh-voltage transformer and a vehicle-lamp lighting-on device using the sameNGK SPARK PLUG CO·Filed 1998·Granted Sep 28, 1999·24 cites·8 claims
- 4563US6474154B2Flow measurement device for measuring flow rate and flow velocityNGK SPARK PLUG CO·Filed 2001·Granted Nov 5, 2002·12 cites·32 claims
- 4661US7341694B2Ammonia sensorNGK SPARK PLUG CO·Filed 2003·Granted Mar 11, 2008·4 cites·27 claims
- 4761US7189364B2Hydrogen sensorNGK SPARK PLUG CO·Filed 2002·Granted Mar 13, 2007·3 cites·17 claims
- 4859US7276141B2Hydrogen gas sensorNGK SPARK PLUG CO·Filed 2003·Granted Oct 2, 2007·2 cites·8 claims
- 4959US6303012B1Gas sensor, gas sensor system using the sameNGK SPARK PLUG CO·Filed 1998·Granted Oct 16, 2001·19 cites·18 claims
- 5059US5993625AExhaust gas sensorNGK SPARK PLUG CO·Filed 1997·Granted Nov 30, 1999·24 cites·9 claims
Showing the top 50 of 72 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →