Inventor

YAMANAKA KOUJI

JP3 patents

⚠️ This page may combine multiple inventors who share the name “YAMANAKA KOUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

DENSO CORP

2 patents

US9397482B2Jul 19, 2016

Spark plug for internal combustion engine

DENSO CORP4 citations64

US8810119B2Aug 19, 2014

Spark plug for an internal combustion engine

DENSO CORP1 citations48

YAMANAKA KOUJI

1 patent

US8841825B2Sep 23, 2014

Spark plug designed to increase service life thereof

YAMANAKA KOUJI1 citations37