Inventor
HIRAKAWA TOSHIHIRO
JP31 patents
⚠️ This page may combine multiple inventors who share the name “HIRAKAWA TOSHIHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NGK INSULATORS LTD
29 patentsUS9700842B2Jul 11, 2017
Honeycomb filter
NGK INSULATORS LTD13 citations84
US9289711B2Mar 22, 2016
Plugged honeycomb structure
NGK INSULATORS LTD13 citations84
US9080479B2Jul 14, 2015
Filter element
NGK INSULATORS LTD11 citations83
US10118121B2Nov 6, 2018
Plugged honeycomb structure and plugged honeycomb segment
NGK INSULATORS LTD2 citations73
US9987582B2Jun 5, 2018
Plugged honeycomb structure and plugged honeycomb segment
NGK INSULATORS LTD3 citations73
US9803596B2Oct 31, 2017
Honeycomb filter
NGK INSULATORS LTD6 citations73
US7488367B2Feb 10, 2009
Honeycomb filter and method of manufacturing the same
NGK INSULATORS LTD2 citations63
US7429416B2Sep 30, 2008
Honeycomb structure
NGK INSULATORS LTD3 citations63
US8911849B2Dec 16, 2014
Honeycomb structure
NGK INSULATORS LTD2 citations62
US11879864B2Jan 23, 2024
Metal terminal
NGK INSULATORS LTD1 citations60
US11609206B2Mar 21, 2023
Gas sensor
NGK INSULATORS LTD0 citations60
US11585781B2Feb 21, 2023
Gas sensor
NGK INSULATORS LTD0 citations60
US11573197B2Feb 7, 2023
Gas sensor with angled sealing element
NGK INSULATORS LTD0 citations60
US10232300B2Mar 19, 2019
Plugged honeycomb structure
NGK INSULATORS LTD1 citations60
US10024209B2Jul 17, 2018
Exhaust gas purification filter, exhaust gas purifier, and method of using exhaust gas purifier
NGK INSULATORS LTD1 citations52
US9205363B2Dec 8, 2015
Dust collecting honeycomb filter
NGK INSULATORS LTD1 citations52
US12467894B2Nov 11, 2025
Gas sensor
NGK INSULATORS LTD0 citations50
US12429454B2Sep 30, 2025
Gas sensor
NGK INSULATORS LTD0 citations50
US12153011B2Nov 26, 2024
Gas sensor
NGK INSULATORS LTD0 citations50
US11815485B2Nov 14, 2023
Gas sensor
NGK INSULATORS LTD0 citations50
US11604161B2Mar 14, 2023
Gas sensor
NGK INSULATORS LTD0 citations50
US12553874B2Feb 17, 2026
Sensor element and gas sensor
NGK INSULATORS LTD0 citations48
US12461057B2Nov 4, 2025
Gas sensor element
NGK INSULATORS LTD0 citations48
US11656151B2May 23, 2023
Sensor
NGK INSULATORS LTD0 citations48
US12553855B2Feb 17, 2026
Gas sensor
NGK INSULATORS LTD0 citations46
US10710324B2Jul 14, 2020
Manufacturing method of honeycomb structure forming die, and honeycomb structure forming die
NGK INSULATORS LTD0 citations42
USD763428SAug 9, 2016
Filter for removing particle matter
NGK INSULATORS LTD1 citations42
US10696010B2Jun 30, 2020
Plugged honeycomb structure and plugged honeycomb segment
NGK INSULATORS LTD0 citations41
US10632709B2Apr 28, 2020
Honeycomb structure
NGK INSULATORS LTD0 citations38