Inventor

CHEN QIGAO

CN3 patents

Patents

3 patents

US9654865B2May 16, 2017

Earphone

GOERTEK INC2 citations67

US10321215B2Jun 11, 2019

Earphone

GOERTEK INC1 citations54

US10306349B2May 28, 2019

Earphone

GOERTEK INC0 citations35