CC

Chung-Ren Chang

AE Ad-Ii Engineering: 3 patents #2 of 7Top 30%
Overall (All Time): #1,346,000 of 4,157,543Top 35%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
12409911 Bicycle operating device 2025-09-09
11814132 Bicycle operating device Kai Hu 2023-11-14
10894576 Bicycle rear derailleur Chien-Hao Su 2021-01-19