KC

Kwangwu Chang

Overall (All Time): #2,064,309 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
8351639 Multi-directional sound emission system — 2013-01-08
8351640 Multi-directional sound emission means and multi-directional sound emission system — 2013-01-08