KC

Ko-Yu Chang

DH Door & Window Hardware: 1 patents #6 of 13Top 50%
Overall (All Time): #1,905,249 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
10627186 Crossbow with Belleville springs 2020-04-21
10448754 Clamp Wei-Hung Chang 2019-10-22