Inventor

WONG ALLAN CHI-YUN

HK2 patents

Patents

2 patents

US7062291B2Jun 13, 2006

Wireless multi-handset telephone system with integrated video monitoring accessories

VTECH TELECOMM LTD209 citations96

US7738917B2Jun 15, 2010

Intercom/wireless door bell for multi-handset telephone system

VTECH TELECOMM LTD278 citations94