LexDanaLexDanabeta
Inventor

Keiji Wakahara

Inventor
Inazawa, JP

Overview

41→
Patents
1993–2015
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 41 as inventor

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

F02Dprimary
F02DControlling combustion engines23%
Y02TClimate change mitigation technologies related to transportation19%
F01PCooling of machines or engines in general13%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof13%
G01KMeasuring temperature11%
G01MTesting static or dynamic balance of machines or structures5%
F01NGas-flow silencers or exhaust apparatus for machines or engines in general4%
F01LCyclically operating valves for machines or engines3%
F02BInternal-combustion piston engines2%
F02NStarting of combustion engines2%
PatentTitleYear
9,157,336'Waste heat recovery structure for steel making electric arc furnaces, steel making electric arc furnace facility, and waste heat recovery method for steel making electric arc furnaces'2015RE041823'Leak check for fuel vapor purge system'20107,797,924'Abnormality diagnosis apparatus for secondary air supply system of engine'2010RE041660'Fuel vapor control system with leak check'20107,757,649'Controller, cooling system abnormality diagnosis device and block heater determination device of internal combustion engine'20107,743,651'Method for detecting malfunction of a cooling system based on detected coolant temperature'20107,483,781'Engine control apparatus'20097,409,284'Apparatus for estimating air-fuel ratios and apparatus for controlling air-fuel ratios of individual cylinders in internal combustion engine'20087,397,148'Vehicular anomaly diagnosis system'20087,363,804'Method for detecting malfunction of a cooling system based on detected coolant temperature'20087,356,985'Air-fuel ratio controller for internal combustion engine'20087,316,223'Device for detecting malfunction in evaporated gas purging system'20087,260,928'Diagnostic device for secondary air supply system'20077,168,399'Abnormality diagnosis apparatus and engine cooling system having the same'20077,146,851'Diagnostic apparatus for variable valve control system'20067,140,241'Leak-check apparatus of fuel-vapor-processing system, fuel-temperature estimation apparatus and fuel-temperature-sensor diagnosis apparatus'20067,137,295'Thermostat malfunction detecting system for engine cooling system'20067,047,799'Thermostat malfunction detecting system for engine cooling system'20067,024,926'Thermostat malfunction detecting system for engine cooling system'20067,010,967'Thermostat malfunction detecting system for engine cooling system'20066,968,268'Misfire detector for an internal combustion engine'20056,957,570'Thermostat malfunction detecting system for engine cooling system'20056,904,792'Abnormality diagnosing apparatus for vehicle'20056,898,927'Emission control system with catalyst warm-up speeding control'20056,892,712'Leak check for fuel vapor purge system'20056,854,452'Fuel vapor handling system'20056,832,509'Fuel vapor control system with leak check'20046,807,851'Leak-check apparatus of fuel-vapor-processing system, fuel-temperature estimation apparatus and fuel-temperature-sensor diagnosis apparatus'20046,725,710'Thermostat malfunction detecting system for engine cooling system'20046,679,110'Thermostat malfunction detecting system for engine cooling system'20046,665,608'Coolant temperature estimation system for estimating temperature of coolant of internal combustion engine'20036,637,416'Diagnosis apparatus for detecting abnormal state of evaporation gas purge system'20036,564,782'Device for detecting canister deterioration'20036,386,022'Thermostat malfunction detecting system for engine cooling system'20026,279,390'Thermostat malfunction detecting system for engine cooling system'20016,148,803'Leakage diagnosing device for fuel evaporated gas purge system'20006,085,706'Valve timing control apparatus for internal combustion engine'20006,082,337'Abnormality detection apparatus for preventing fuel gas emission'20006,047,674'Valve timing control apparatus for internal combustion engine'20005,728,941'Misfire detecting apparatus using difference in engine rotation speed variance'19985,263,453'Apparatus for detecting misfire in internal combustion engines for vehicles'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993Patents assigned to NIPPON DENSO CO (1)· patent assignee history
1998–2010Patents assigned to DENSO CORP (39)· patent assignee history
1998–2008Based in Kariya, JP· patent location history
2000Based in Nagoya, JP· patent location history
2003–2010Based in Inazawa, JP· patent location history
2010Based in Kairya, JP· patent location history
2015Patents assigned to FUJIKURA NOBUYUKI (1)· patent assignee history
2015Patents assigned to JP STEEL PLANTECH CO (1)· patent assignee history
2015Patents assigned to OKUYAMA YOSHINORI (1)· patent assignee history
2015Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DENSO CORP391998–2010
FUJIKURA NOBUYUKI12015
JP STEEL PLANTECH CO12015
NIPPON DENSO CO11993
OKUYAMA YOSHINORI12015
Locations
LocationPatentsSpan
Inazawa, JP232003–2010
Kariya, JP111998–2008
Nagoya, JP42000
Yokohama, JP12015
Kairya, JP12010