Inventor

QIAN KAIHUA

CN2 patents

Patents

2 patents

US11089400B2Aug 10, 2021

Coaxial loudspeaker

SUZHOU SONAVOX ELECTRONICS CO LTD0 citations54

US11279278B2Mar 22, 2022

Pedestrian warning device having grille cover

SUZHOU SONAVOX ELECTRONICS CO LTD0 citations44