Inventor
FUJIWARA TAKAHIKO
JP51 patents
⚠️ This page may combine multiple inventors who share the name “FUJIWARA TAKAHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TOYOTA MOTOR CO LTD
26 patentsUS7474956B2Jan 6, 2009
Air-fuel ratio control system of internal combustion engine
TOYOTA MOTOR CO LTD9 citations84
US7159388B2Jan 9, 2007
Air-fuel ratio control device for internal-combustion engine
TOYOTA MOTOR CO LTD10 citations84
US9624811B2Apr 18, 2017
Control device of internal combustion engine
TOYOTA MOTOR CO LTD4 citations73
US7469530B2Dec 30, 2008
Fuel cut control apparatus of internal combustion engine
TOYOTA MOTOR CO LTD8 citations73
US9611776B2Apr 4, 2017
Deterioration diagnosis device for an exhaust gas purification apparatus
TOYOTA MOTOR CO LTD2 citations72
US11047288B2Jun 29, 2021
Control device for internal combustion engine
TOYOTA MOTOR CO LTD2 citations71
US7729847B2Jun 1, 2010
Air-fuel ratio control device of internal combustion engine
TOYOTA MOTOR CO LTD6 citations62
US11286837B2Mar 29, 2022
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations61
US11261777B2Mar 1, 2022
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations61
US11255246B2Feb 22, 2022
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations61
US11236658B2Feb 1, 2022
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations61
US11215103B2Jan 4, 2022
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations61
US11199119B2Dec 14, 2021
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations61
US11149615B2Oct 19, 2021
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations61
US11149616B2Oct 19, 2021
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations61
US11105247B2Aug 31, 2021
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations61
US11105248B2Aug 31, 2021
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations61
US7861514B2Jan 4, 2011
Method and device for detecting deterioration of catalyst
TOYOTA MOTOR CO LTD6 citations61
US12473852B2Nov 18, 2025
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations60
US11067017B2Jul 20, 2021
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations52
US10072553B2Sep 11, 2018
Deterioration diagnosis apparatus for selective catalytic reduction catalyst
TOYOTA MOTOR CO LTD1 citations52
US7795174B2Sep 14, 2010
Catalyst for purifying exhaust gases
TOYOTA MOTOR CO LTD1 citations52
US8371277B2Feb 12, 2013
Control system for internal combustion engine
TOYOTA MOTOR CO LTD0 citations50
US10066534B2Sep 4, 2018
Internal combustion engine
TOYOTA MOTOR CO LTD0 citations42
US9562486B2Feb 7, 2017
Control device for internal combustion engine
TOYOTA MOTOR CO LTD0 citations42
US10072544B2Sep 11, 2018
Deterioration diagnosis apparatus for the exhaust gas purification apparatus
TOYOTA MOTOR CO LTD0 citations41
FUJIWARA TAKAHIKO
8 patentsUS8464522B2Jun 18, 2013
Control apparatus for internal combustion engine
FUJIWARA TAKAHIKO24 citations92
US8122869B2Feb 28, 2012
Air-fuel ratio control system of a multi-cylinder internal combustion engine
FUJIWARA TAKAHIKO6 citations72
US8240131B2Aug 14, 2012
Exhaust gas purifying apparatus for internal combustion engine
FUJIWARA TAKAHIKO3 citations62
US8230846B2Jul 31, 2012
Air-fuel ratio control device for internal combustion engine
FUJIWARA TAKAHIKO4 citations62
US8074441B2Dec 13, 2011
Apparatus and method for determining catalyst degradation
FUJIWARA TAKAHIKO5 citations62
US8266898B2Sep 18, 2012
Control apparatus for internal combustion engine
FUJIWARA TAKAHIKO4 citations61
US9212583B2Dec 15, 2015
Air-fuel ratio control device for internal combustion engine
FUJIWARA TAKAHIKO0 citations41
US8949000B2Feb 3, 2015
Control device and control method for internal combustion engine
FUJIWARA TAKAHIKO0 citations41
HITACHI LTD
3 patentsUS5337090AAug 9, 1994
Video output circuit with wide bandwidth and low power consumption for high resolution display
HITACHI LTD9 citations73
US5589883ADec 31, 1996
Cathode ray tube display
HITACHI LTD15 citations71
US5189347AFeb 23, 1993
Video circuit for driving a cathode ray tube
HITACHI LTD3 citations59
ONOE RYOTA
3 patentsASO KOJI
2 patentsTOMIMATSU MAKOTO
2 patentsMATSUDA KAZUHISA
1 patentFUKUTOMI IPPEI
1 patentKITAURA KOICHI
1 patentNAKANO TOMOHIRO
1 patentTSUKAGOSHI TAKAHIRO
1 patentNAKAGAWA NORIHISA
1 patentShowing the top 50 of 51 patents by PatentIndex Score.