P

Inventor

SHIMA YUJI

JP10 patents
⚠️ This page may combine multiple inventors who share the name “SHIMA YUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

KK RIKEN

4 patents
US12188564B2Jan 7, 2025

Piston ring, and method for manufacturing same

KK RIKEN0 citations61
US11512777B2Nov 29, 2022

Piston ring

KK RIKEN0 citations61
US10502319B2Dec 10, 2019

Piston ring and its production method

KK RIKEN0 citations48
US10227670B2Mar 12, 2019

Piston ring and its production method

KK RIKEN0 citations38

SEKIYA TAKUMA

3 patents
US8597797B2Dec 3, 2013

Chromium nitride ion-plating coating and its production method, as well as piston ring used for internal combustion engine

SEKIYA TAKUMA10 citations77
US9371797B2Jun 21, 2016

Piston ring

SEKIYA TAKUMA1 citations48
US9347559B2May 24, 2016

Piston ring

SEKIYA TAKUMA1 citations48

SHIMA YUJI

2 patents
US9617952B2Apr 11, 2017

Compression ring and its production method

SHIMA YUJI0 citations40
US9599223B2Mar 21, 2017

Compression ring and its production method

SHIMA YUJI0 citations36

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

1 patent
US7098584B2Aug 29, 2006

Deflection yoke

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD0 citations39