Inventor
AKIYOSHI RYOHEI
JP13 patents
⚠️ This page may combine multiple inventors who share the name “AKIYOSHI RYOHEI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DENSO CORP
9 patentsUS10938186B2Mar 2, 2021
Spark plug electrode and spark plug
DENSO CORP2 citations72
US9847622B2Dec 19, 2017
Spark plug for an internal combustion engine
DENSO CORP1 citations50
US10050417B2Aug 14, 2018
Spark plug and manufacturing method thereof
DENSO CORP0 citations41
US9935429B2Apr 3, 2018
Ignition control system
DENSO CORP0 citations41
US10777974B2Sep 15, 2020
Spark plug for internal combustion engine that makes re-discharge less prone to occur
DENSO CORP0 citations40
US10505347B2Dec 10, 2019
Spark plug for internal combustion engine
DENSO CORP0 citations40
US10348060B2Jul 9, 2019
Spark plug
DENSO CORP0 citations40
US10693280B2Jun 23, 2020
Spark plug
DENSO CORP0 citations39
US10431960B2Oct 1, 2019
Spark plug for internal combustion engine
DENSO CORP0 citations39
ISHIFUKU METAL IND
4 patentsUS11131008B2Sep 28, 2021
Heat-resistant Ir alloy
ISHIFUKU METAL IND4 citations69
US11486024B2Nov 1, 2022
Heat-resistant Ir alloy wire
ISHIFUKU METAL IND2 citations67
US11773473B2Oct 3, 2023
Heat-resistant IR alloy
ISHIFUKU METAL IND0 citations59
US11505848B2Nov 22, 2022
Heat-resistant Ir alloy
ISHIFUKU METAL IND0 citations57