YN

Yuk Hung Ng

HC Helms-Man Industrial Co.: 4 patents #1 of 2Top 50%
Overall (All Time): #1,255,063 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
D556138 Changeable plugs system — 2007-11-27
7223126 Plug device with a plug adapter — 2007-05-29
D543147 Changeable plugs system — 2007-05-22
6655996 Wall socket with swaged prongs — 2003-12-02