Inventor

Takafumi Oshima

Inventor

Aichi, JP

Overview

1987–2008

Patent span

Physics

Primary field (CPC G)

Patents· 62 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G01Nprimary

G01NInvestigating or analysing materials by determining their chemical or physical properties35%

H01TSpark gaps16%

G01FMeasuring volume, volume flow, mass flow or liquid level7%

F02DControlling combustion engines5%

Y02ATechnologies for adaptation to climate change4%

F01NGas-flow silencers or exhaust apparatus for machines or engines in general3%

Y02TClimate change mitigation technologies related to transportation3%

Y10TTechnical subjects covered by former us classification3%

C04BLime, magnesia2%

F02BInternal-combustion piston engines2%

PatentTitleYear

7,341,694'Ammonia sensor'2008 7,306,712'Gas sensor and method for measuring gas concentration using the same'2007 7,276,141'Hydrogen gas sensor'2007 7,189,364'Hydrogen sensor'2007 7,080,543'Sensor and method for manufacturing the same'2006 6,923,902'Methods and apparatus for measuring NOx gas concentration, for detecting exhaust gas concentration and for calibrating and controlling gas sensor'2005 6,886,412'Ultrasonic-wave propagation-time measuring method and gas concentration sensor'2005 6,812,821'Humidity sensor'2004 6,805,003'Mass flow sensor and mass flowmeter comprising the same'2004 6,797,151'CO sensor and method of measuring CO concentration'2004 6,770,508'Electrode for silicon carbide semiconductor, silicon carbide semiconductor element comprising the electrode, and production method therefor'2004 6,743,352'Method and apparatus for correcting a gas sensor response for moisture in exhaust gas'2004 6,695,964'Method and apparatus for measuring NOx gas concentration'2004 6,652,723'Hydrogen gas sensor'2003 6,647,776'Split-flow flowmeter with a profusion facing the detection element'2003 6,635,162'Gas sensor'2003 6,627,964'Gas sensor'2003 6,578,414'Split-flow-type flowmeter'2003 6,568,240'Method and apparatus using a gas concentration sensor for accurately controlling an air fuel ratio in an internal combustion engine'2003 6,568,281'Ultrasonic-wave propagation-time measuring method, gas-pressure measuring method, gas-flow rate measuring method, and gas sensor'2003 6,554,984'Method of manufacturing a gas sensor'2003 6,533,911'Device for measuring combustible-gas concentration in an exhaust gas'2003 6,526,822'Flow rate and flow velocity measurement device'2003 6,478,339'Displacement absorbing piping joint'2002 6,474,154'Flow measurement device for measuring flow rate and flow velocity'2002 6,474,177'Flow measurement device for measuring flow rate and flow velocity'2002 6,418,782'Gas concentration sensor'2002 6,375,828'Methods and apparatus for measuring NOx gas concentration, for detecting exhaust gas concentration and for calibrating and controlling gas sensor'2002 6,344,134'Method for measuring NOx concentration and NOx concentration sensor'2002 6,338,783'Gas sensor, method of manufacturing the same, and gas sensor system using the gas sensor'2002 6,337,006'Lanthanum gallate sintered body'2002 6,337,009'Gas sensor'2002 6,325,906'Gas sensor and apparatus for measuring combustible gas component concentration using the same'2001 6,308,572'Gas concentration sensor'2001 6,303,012'Gas sensor, gas sensor system using the same'2001 6,224,727'NOx sensor'2001 6,214,208'Method and apparatus for measuring NOx gas concentration'2001 6,153,072'Gas sensor, gas sensor system using the same, and method of manufacturing a gas sensor'2000 6,136,170'Exhaust gas sensor and system thereof'2000 6,084,354'Vehicle-lamp lighting-on device'2000 6,071,393'Nitrogen oxide concentration sensor'2000 5,993,625'Exhaust gas sensor'1999 5,989,624'Method for manufacturing electrode'1999 5,959,521'High-voltage transformer and a vehicle-lamp lighting-on device using the same'1999 5,959,407'Vehicle lighting drive apparatus'1999 5,846,390'Non-membrane water electrolyzer'1998 5,578,895'Spark plug having a noble metal electrode tip'1996 5,578,894'Spark plug for use in internal combustion engine'1996 5,461,275'Spark plug for use in an internal combustion engine'1995 5,440,198'Spark plug having a noble metal firing tip bonded to a front end of a center electrode'1995 5,347,193'Spark plug having an erosion resistant tip'1994 5,320,569'Method of making a spark plug'1994 5,273,474'Method of manufacturing a center electrode for a spark plug'1993 5,210,457'Outer electrode for spark plug and a method of manufacturing thereof'1993 5,204,579'Ceramic insulator for spark plug structure'1993 5,172,025'Glass sealant of spark plug insulator for use in an internal combustion engine'1992 5,101,135'Spark plug for use in an internal combustion engine'1992 5,017,826'Rapid heat-dissipating type spark plug for internal combustion engines'1991 4,967,116'Spark plug having heat- and corrosion-resistant surface'1990 4,949,006'Spark plug structure'1990 4,700,103'Spark plug and its electrode configuration'1987 4,670,684'Spark plug'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–2008Patents assigned to NGK SPARK PLUG CO (60)· patent assignee history

1987–2008Based in Aichi, JP· patent location history

1990–2005Based in Nagoya, JP· patent location history

1998Patents assigned to TOTO LTD (1)· patent assignee history

1998Based in Kitakyushu, JP· patent location history

2002Patents assigned to NEW TOKYO INTERNAT AIRPORT AUT (1)· patent assignee history

2002Based in Narita, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NGK SPARK PLUG CO	60	1987–2008
NEW TOKYO INTERNAT AIRPORT AUT	1	2002
TOTO LTD	1	1998

Locations

Location	Patents	Span
Aichi, JP	33	1987–2008
Nagoya, JP	27	1990–2005
Narita, JP	1	2002
Kitakyushu, JP	1	1998