Inventor

KISHIHARA RYUJI

JP7 patents

Patents

7 patents

US11719298B2Aug 8, 2023

Coil spring

SUNCALL CORP2 citations70

US9400026B2Jul 26, 2016

Spiral spring

SUNCALL CORP2 citations60

US7556011B2Jul 7, 2009

Valve structure for internal combustion

SUNCALL CORP4 citations60

US11181160B2Nov 23, 2021

Coil spring

SUNCALL CORP0 citations59

US11499600B2Nov 15, 2022

Coil spring

SUNCALL CORP0 citations49

US11131356B2Sep 28, 2021

Coil spring

SUNCALL CORP0 citations49

US9782819B2Oct 10, 2017

Spiral spring manufacturing method

SUNCALL CORP0 citations39