Inventor

Shi yi min

FI3 patents

Patents

3 patents

USD840854SFeb 19, 2019

Cylindrical emergency signaling device

KONE CORP29 citations92

USD801842SNov 7, 2017

Emergency signaling device

KONE CORP7 citations82

US10053336B2Aug 21, 2018

Emergency button

KONE CORP0 citations50