Inventor
LIU KING HEI
HK4 patents
Patents
4 patentsUS9445172B2Sep 13, 2016
Headphones with interactive display
PONG RONALD6 citations79
US11044544B2Jun 22, 2021
Headphones with interactive display
PONG RONALD2 citations69
US10433044B2Oct 1, 2019
Headphones with interactive display
PONG RONALD2 citations69
US9756414B2Sep 5, 2017
Headphones with interactive display
PONG RONALD4 citations68