Inventor

Zhang Guangjiao

CN4 patents

Patents

4 patents

US11564496B1Jan 31, 2023

Interlockingly extending driving mechanism for electric sofa

DEWERTOKIN TECH GROUP CO LTD10 citations83

US11478083B1Oct 25, 2022

Sofa backrest adjusting apparatus with integrated headrest and lumbar cushion

DEWERTOKIN TECH GROUP CO LTD12 citations83

US12408754B2Sep 9, 2025

Adjustable bracket and high-feet sofa

DEWERTOKIN TECH GROUP CO LTD2 citations73

US12478186B2Nov 25, 2025

Chair frame and chair

DEWERTOKIN TECH GROUP CO LTD0 citations50