KC

Kuo-Yi Chang

Overall (All Time): #1,599,806 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6918856 Waist twisting machine 2005-07-19
6758792 Waist training machine 2004-07-06
6254501 Metal racket 2001-07-03