Inventor

DUAN GUOQI

CN3 patents

Patents

3 patents

US11073189B2Jul 27, 2021

Pre-compression type emergency air spring assembly

ZHUZHOU TIMES NEW MAT TECH CO2 citations68

US11287006B2Mar 29, 2022

Emergency air spring assembly

ZHUZHOU TIMES NEW MAT TECH CO0 citations57

US11287007B2Mar 29, 2022

Prepressed emergency air spring assembly

ZHUZHOU TIMES NEW MAT TECH CO0 citations47